This movie was inspired by a Japanese novel written in 1997.
Juno is an ordinary salaried worker working for a life insurance company. One day, he answered a strange inquiry on service phone from someone talking gloomily. The woman asked that if client dies, how much money would be offerd. Juno shouldn't have answerd in his own opinion based on emotion. Actually, most of the counselors of insurance company have to comply with the guide book when they answer the inquiries. Juno said that All her life is valuable, so she must not kill by herself.
Some days later, Juno was requested to visit for counseling from a man. The man's name is Choong-bae and he has some insurance receipts. When Juno arrived at Choong-bae's house, there was a child hung from a beam. Choong-bae acted so weird studying Juno's face and he asked a lot of money. The conclusion about the dead boy is formed as a suicide through the police investigation. Juno had been feeling suspicious and restarted investigation by himself.
He noticed that Choong-bae's wife(E-hwa) had insured some years ago. Then he warned to E-hwa that Choong-bae would kill her. But she has a record of divorce three times. In fact, all of her ex-husbands had been killed by her. It is the top turning over in this movie. She can't feel pain and any guilty, because she is a psychopath! Now, Juno is the last target of her.