Kim Hae-suk and her friends run away from their homes and come to Seoul. There, they find men to support them but soon abandon them once they find jobs. They soon marry other people. During her honeymoon, two women are killed by a psychotic killer. Hae-suk knows that the body is being kept in preservative liquids in the criminology laboratory. But she finds out that the body is missing from the lab. The heart from the body which is in a separate container begins to pump and the evil hands reach towards Hae-suk.

Two housewives, wounded by their husbands' betrayals, meet by chance. They decide to carry out "exchange murders" and work towards the perfect alibis. Under what they know to be perfect plans, they kill each other's husbands. Although the police are able to prove that they're guilty, these two women are found innocent by the court of law.