Man-Dong explains to Seung-Hee that the house is too old. He finds out that the window was opened when she is looking into each place in the room. He sees Bun-Ok and tells her to leave. Seung-Hee walks to Man-Dong. She tells him that someone used the bathroom so that the water leaked to downstairs.
But Man-Dong doesn’t agree to what Seung-Hee said. He tells her to leave. Gyeong-Ja calls Seung-Hee and points at the window after Bun-Ok hinted her. Seung-Hee walks to the window and opens it. But she doesn’t see anything. She tries to leave. But she hears the sound. She opens the window again and takes a look at the ground. She doesn’t see anything.
Yeong-Ro is scared to trip from the wall. Soo-Ho catches her before she falls. But her shoe drops to the ground. Soo-Ho saves Yeong-Ro with his arm. She hugs him. Seung-Hee gets Man-Dong to lock the door. She takes away the key. Soo-Ho carries Yeong-Ro into the room and hands over the coffee to her when she wears the blanket.
Soo-Ho warms Yeong-Ro’s hands with his hands. He lifts the cup. She drinks the coffee and complains to him that she almost got killed. She tries to leave but sees the blood on his shoulder. She dresses the wound for him and tells him not to move. He agrees to it.
Seung-Hee puts the key into the drawer. She opens the secret compartment. There’s another key. Yeong-Ro finds out that the door is closed. She reports it to Soo-Ho. Hye-Ryeong is slapped by Seol-Hui when she falls asleep. Jeong-Min wakes up and finds out that Yeong-Ro is missing.
Yeong-Ro worries that Seung-Hee will find what she did. Soo-Ho comforts her that he will help her. Jeong-Min runs out of the room, trying to go to second floor. She sees Man-Dong and calls him. She helps him when he walks. Soo-Ho tears up the paper from the notebook. He makes a paper airplane and casts to the window. The paper airplane falls after it reached the window.
Man-Dong opens the door when Soo-Ho is teaching Yeong-Ro to fold the paper airplane. Man-Dong tells Soo-Ho that Seung-Hee took away the key. Soo-Ho wants to leave the dormitory because he doesn’t want to get Yeong-Ro involved. Man-Dong agrees to Soo-Ho’s plan. He tells him that he will open the path for him.
But Yeong-Ro is against it because she worries that Soo-Ho will get arrested by the police. She mentions the dormitory will be opened in a few days. But Soo-Ho insists on leaving immediately. Man-Dong takes the group to leave. But they run into Gyeong-Ja when they go downstairs.
Man-Dong learns that Gyeong-Ja is sleepwalking. He helps her walk in the right path after she was blocked by the door. She turns around and her face is changed to another woman’s face. He’s startled after seeing the face. Man-Dong takes the group to reach the door after they walked for a while. He tries to open the door. But Soo-Ho stops Man-Dong.
Soo-Ho takes a look at outside. He finds out that the police are looking for him. Gyeong-Ja tells the students that they’re going to have a dance party. Yeong-Ro is happy to report it to Soo-Ho. She gives the ticket to him and tells him to take part in the party.
Yeong-Ro is drying clothes on the rooftop. Bun-Ok shows up. She thinks the spy is hiding in the house. Yeong-Ro doesn’t think so. She mentions the house hasn’t been used for a long time. Bun-Ok agrees to what Yeong-Ro said. She helps her dry the clothes.
Jeong-Min breaks into the room to look for Yeong-Ro. But she sees Gwang-Tae hugging Seol-Hui. Seol-Hui panics to push Gwang-Tae over. He takes her to run out of the room. Hye-Ryeong takes people to dance in the party. She warms up the atmosphere.
The classmate tells Yeong-Ro to dance. Yeong-Ro sees Soo-Ho. The girl hands over the drinks to Soo-Ho. But he rejects it. She’s embarrassed. Yeong-Ro is pushed to the dance floor. Soo-Ho notes it. He walks to her and has a perfect dance with her.
Hye-Ryeong wakes Yeong-Ro up. Yeong-Ro finds out that the dance was just her illusion. She’s pushed aside by Hye-Ryeong. Soo-Ho takes Yeong-Ro to leave the party. Bun-Ok sees it. She’s furious to throw away the paper cup after she drank up the coffee. She tails the two.
Soo-Ho and Yeong-Ro walk out of the dormitory. Jeong-Min is waiting for them. Soo-Ho tries to ride the bicycle away. But Jeong-Min stops him and gets him to give Yeong-Ro a ride. She thinks the police won’t find him if the two pretend to be a couple. But they’re spotted by Bun-Ok.
Gwang-Tae is furious after knowing Hye-Ryeong invited another guy to the party. He grabs Seol-Hui’s hands when they’re at the cafe. She’s shy to take back her hands. Soo-Ho rides the bicycle. Yeong-Ro asks him if he knows where her room is. But he doesn’t answer her.
He parks the bicycle. She gets off the bicycle. He tries to leave. But she stops him when the snow drops to her hair. Gwang-Tae sits with Seol-Hui and grabs her hands. She’s startled to look around the cafe. She takes back her hands again. Gwang-Tae spots Yeong-Ro and Soo-Ho. He reports it to the police.
Yeong-Ro sees Soo-Ho riding the bicycle away. She’s lost when she walks. But she doesn’t know he stops for her. She turns around and sees him riding the bicycle to her. She smiles. He walks to her after he parked the bicycle.