This Korean horror movie offers a feminist twist in that it centers on two female protagonists living next door to each other in a high-rise apartment building. The title refers to their respective apartment numbers. The story opens as one of the women, a compulsive cook, is being questioned about the mysterious disappearance of her neighbor, the other woman, a traumatized writer suffering from anorexia nervosa. The two meet when the friendly cook tries to give the writer some of her newest creation. The writer later throws the food away. Still, a friendship is born, and as they converse, the tragic reasons for the writer's condition come to light. Dark secrets from the cook's past are also revealed. It is she who offers up the grisly final solution to the writer's guilt and continual pain.