The Neighbors

“Watch who lives next door.”

In a Seoul apartment building, a girl from one of the families is found murdered, and her neighbors start to wonder who on the other side of the wall could have done it. Kyung-hee (Yunjin Kim), the girl's stepmother, begins asking questions that Kim Hwi keeps close to the doors and stairwells where everyone lives. Meanwhile the man they are circling is already planning his next victim, a young girl in the same building, and time is short.