It's dark outside, and the doctor can't get away from the darkness. He's still looking for Jungyeon, but he doesn't know what he's doing. He wants to know why she's asking him to give her his blood. The doctor says he tried to keep his distance from her so he wouldn't think she was lying about their relationship. He also says that it's unbearable for him to find out that her sister went missing. He asks her to stop doubting him. He says that he loves her, and that's why she went missing in the first place. But what makes her think that she loves him? Did she ever hear him say that she loved him? She's just a greedy girl, he says. He adds that anyone can replace his spot for her sister. What a crazy woman, she says. She says that she'll be late, so she'd have to pick up her blood and put it in the refrigerator before she leaves. She'll have to go back to work as soon as she finishes, but she promises to give all of her blood to her lover if he wants it. She asks him what's his relationship with this lady? He says he thought she asked him to have sex, but that doesn'T necessarily mean he wants her. What's he doing right now? His blood is poison. What are he going to do?