Chi Hyun rushes home to check on Dad, fearing his life is at risk, and hears Dad in the middle of leaving his voicemail message to Joon Jae. It hurts to hear him expressing his regrets for leaving his former family and telling Joon Jae (played by Lee Min Ho) that he loves him.
Then Dad’s hand goes slack, and Chi Hyun rushes to his side, holding a finger to Dad’s nose to check his breath. He recoils when there’s no sign of life, then spots the glass of tainted water on the nightstand and dumps out the liquid, washing the glass compulsively before calling for an ambulance. When the authorities arrive, a regular glass of water is on the nightstand and Chi Hyun plays the part of grieving son. He answers police officers’ questions about Dad’s medical history and Mom’s whereabouts.
Joon Jae rushes to the house as the body is being carried out and falls to his knees in grief. He spots Chi Hyun stepping out with the officer and launches himself at him, decking him in the face, accusing him and his mother of being the reason for Dad’s death. Joon Jae swears to kill them both, while Chi Hyun puts on his most victimized face as he lets Joon Jae rage away.
The officer shoves him aside, demanding to know who he is. Joon Jae identifies himself as the chairman’s son, but balks when Chi Hyun calls him his brother and punches him again. It takes a whole team of cops to pull Joon Jae off him, but then Detective Hong races in to order them to back off Joon Jae.
Detective Hong gets Joon Jae to calm down, and all that anger turns to self-recrimination as Joon Jae cries that he should have prevented Dad’s death. The detective tells him that it’s all the more reason for him to pull himself together and get to the bottom of this.
At home, Chung (played by Jun Ji Hyun) paces by the pool, which seems like a terrible idea to me, given how Nam Doo seeks her out here. He asks how she knew Dae Young had lost his memory, venturing a guess: “Did you by any chance do that to him?” He leans in closer and says that she’s quite a mystery, and that he’s curious to know what skills she possesses. “Who are you?” he asks.
“I’m your friend,” Chung tells him. Nam Doo says that in his line of work, he frequently makes friends with people and then backstabs them. She replies that she dislikes that about him, “But when I make friends with someone, that’s it for me. Whether you backstab or not, that’s your choice. I’ll think about what I’ll do if you do backstab me. Until then, you’re my friend.” That’s when Tae Oh bursts in with news, and the three of them head to the hospital to join Joon Jae for his father’s funeral. They find him sitting on the ground in the hallway, and the boys step aside to give him and Chung some privacy.
She kneels by him and cradles him to her, and he cries in her arms. He asks Chung to erase his memories of his father, saying, “Good memories hurt because they’re good, and bad memories hurt because they’re bad. All of my memories of my father hurt so much.”
Chung replies, “But I can’t erase them. No matter how much they hurt, you loved your father. Memories of love should be carried with you even if they’re painful.”
Joon Jae blames himself for not arriving quickly enough to save his father, for not hating him a little less, and for not answering that last call to tell Dad he forgave him and loved him. And now he can’t say the words, no matter how badly he wants to.
Chung tells him consolingly, “Some things can be understood without saying the words. He will have known.”
A short while later, Chi Hyun leads his mother toward the mortuary, and Joon Jae stiffens at the sight of them. Stepmom collapses in tears and acts like the classic grief-stricken widow, wailing that she won’t be able to live without her husband. Chung holds Joon Jae’s hand throughout Stepmom’s display, which ends in her fainting in shock.
Joon Jae sits with his mother later, and she sighs that as she ages, the old memories stay with her longer than the newer ones. She adds as an afterthought, “Although it didn’t seem that way for your father,” and Joon Jae asks if she met Dad recently.
She explains that she’d run into him at the hospital and he’d ignored her even after making eye contact, like he’d forgotten her. She chalks it up to him being mean, but Joon Jae tells her of his near-blindness, and then holds his mother as she cries in his arms.
From a hospital bed, Stepmom calls her lawyer to arrange all the inheritance and legal details with cool efficiency. Chi Hyun makes sure nobody’s watching, then asks his mother in a low voice whether she was behind it: “You must tell me. I have to know in order to help you.” Stepmom confirms it, but adds that if something were to happen, he knows nothing about anything.
Chi Hyun runs into Nam Doo in the hallway and calls out to him. Not far away in his hospital bed, comatose Manager Nam continues dreaming of his Joseon past:
Joseon Nam Doo trains as one of Lord Yang’s many henchmen, the newest arrival who’s known for his fighting skills. Lord Yang assigns him to attend to his son—Joseon Chi Hyun. The two men size each other up…
…just like they do in the present, in the corridor. Chi Hyun asks to talk, and starts by explaining that he knows about Nam Doo because he’d looked into Joon Jae’s activities out of concern. Chi Hyun notes that Joon Jae only goes after ill-gotten gains like slush funds, but Nam Doo has not been so discriminating. Nam Doo readily agrees, and wonders at Chi Hyun’s interest.
Chi Hyun drops to banmal and says coldly, “It means I can put you behind bars tomorrow, or even today. What do you wanna do—do as I say, or rot?”
Nam Doo just smiles and tells Chi Hyun that he’s always on the side of the ones with money. If Chi Hyun stands to inherit everything from his stepfather, Nam Doo has plenty of reason to stand with him, even without blackmail.
Chi Hyun says he intends to get rid of Joon Jae. Nam Doo doesn’t bat an eyelash, and says that there’s something he really wants, and having Joon Jae out of the picture would make it easier for him to take it. He admits to feeling some attachment to Joon Jae, but is perfectly willing to make a deal with Chi Hyun.
Everyone gathers around to hear Dad’s cause of death, which the doctor announces as a sudden but natural death as a result of acute renal failure—not the result of poisoning, which would have caused signs that Dad’s body didn’t have. Joon Jae argues that the use of naturally occurring poisons (say, those in toxic flowers) wouldn’t have produced those signs, and demands an autopsy.
Stepmom protests that he’d be “killing your father twice” by dragging this out, as though he’s a petulant teenager who can’t get over the past. But Joon Jae vows to uncover the true cause of death, and her role in it. Mom acts outraged, suggesting that he’s only interested in his father after years of ignoring him because of the money. She sobs that she’ll give him all the money if he’ll just let his father rest in peace—but Joon Jae is unmoved, warning that her acting won’t work anymore.
Chi Hyun steps in and asserts himself as the only son Chairman Dad acknowledged, stating that Joon Jae only popped up recently when inheritance issues surfaced. He says that neither he nor Stepmom want the autopsy, and the chairman wouldn’t have wanted it, either.
But the next thing we know, a team of police officers and forensic specialists descend upon Dad’s house, led by Detective Hong with his search and seizure warrant. Stepmom seems quite unworried that the search will turn up any evidence (and force an autopsy), until Detective Hong brings up the name Kang Ji-hyun.
She keeps her calm, telling him to talk to her lawyer about anything further, and Detective Hong tells her pointedly that she’ll have a lot to say to the lawyer, since that’s her twin. Then he produces an old photo of Stepmom as a child, standing with her twin sister.
Stepmom doesn’t betray her nervousness and pretends she doesn’t know what he’s talking about. Detective Hong asks where younger sister Kang Ji Hyun is, then guesses, “Or is that you?”
The search doesn’t turn up any evidence, and a forensic expert asks if Detective Hong jumped the gun. But Detective Hong is certain that whatever evidence they’re looking for is still in the house—Stepmom couldn’t have removed it without their noticing. He looks around the basement, and the camera lingers on a wooden panel.
Jin Joo hears about the chairman’s death, and it introduces a new wave of worries for her and her husband. They’d assumed that the chairman’s will would eventually get revised to include his biological son, but now that he’s dead, the current will stands—and that means they’ve made an enemy of the winner and stood with the loser.
Even so, Jin Joo ends up accompanying Mom to the mortuary. Stepmom hisses that her presence is unseemly, but Mom says that she’s here to draw attention and make things uncomfortable for her. Mom then pays her respects to Dad, asking if he can see her as she makes her last goodbye.
Stepmom confronts Mom in the bathroom, sneering at her for showing up out of the blue, just like her son did. She insinuates that Mom is sniffing around for money, and Mom delivers a satisfying slap. She tells Stepmom in a steely voice that she’s the one who came sniffing at the scent of money, and that she should have been satisfied with mooching off of others: “Is the thief trying to act like the owner now? You’re being greedy.”
Stepmom raises a hand to slap Mom back, but finds her hand suddenly caught in a firm grasp. It’s Chung, who asks, “So you’re going to hit her? You’re not in a position to be hitting anybody.” Stepmom curls her lip to realize that Chung is on Mom’s side, and tries to break her grasp. But Chung easily keeps hold, and says she’s curious to know something. She shoves Stepom back against the wall, still holding her hand, then closes her eyes to concentrate.
Memories flash through their connected minds: Stepmom swapping out the chairman’s pills, boiling water with poisonous wolfsbane, serving that to the chairman. She then steps into the basement and opens a hidden door, revealing the room where she’s keeping the flowers, evidence, and Dae Young.
Stepmom seems dazed when Chung lets go of her, and asks what she just did. Chung replies, “I could have done anything, but I didn’t do anything. I don’t think you should forget all the bad things you’ve done. You should remember them through the end. You’ll have to remember all those things you felt greedy about, for you to feel more pain at not having them.”
Outside, Jin Joo spots the other society moms who’d once been on her side, who are now busy sucking up to Stepmom to weasel their way back into her graces. It only makes her feel worse about her own position, and she simultaneously scoffs at them while looking a bit envious.
Nam Doo joins Joon Jae and asks if he really has to pursue the autopsy, arguing that an autopsy won’t bring back his father. He suggests that it may be best to not stir the pot further and just focus on getting his share of the inheritance. Joon Jae gets angry at the suggestion, while Nam Doo just tells him to consider it.
Chung joins Joon Jae next, telling him of her vision. As they drive over to Dad’s house, Joon Jae says it makes him sad to know that through him, she’s seen a lot of bad things that have become her memories. Chung counters that she’s happy to have something with which to protect him.
The idea of her protecting him surprises him a little, but Chung boasts that as a mermaid, she was really quite adept, evading notice from humans and not getting eaten by sharks. She even adds confidently, “Even if I fought with a shark, I’d win.”
Joon Jae praises her and pats her head, and she’s happy to have made him smile. “I’ll make you smile from now on,” she promises.
Joon Jae replies that such words (protecting someone, promising to make them smile) are the kind of thing men say, and Chung just replies, “I’ll protect you. I’ll make you smile.” Joon Jae takes her hand in his, and she kisses his.
Arriving at Dad’s house, the hear from Detective Hong that nothing’s been found. Recalling Stepmom’s memory, Chung follows those visions to the basement, even though Detective Hong says that they already searched the room.
Chung, however, knows which panel to push to reveal the hidden room inside. Inside is a wealth of evidence, including the bins of wolfsbane and a drawing of a mermaid on the wall, which Chung says is Dae Young’s work—he’s been here.