Kaihen is a tennis player. He accidentally discovered that his wife is not observing women's ways, so he plans to divorce his wife, but his wife disagrees. This makes Kaihen unable to get along with the girlfriend he just met, which he is very upset. One day, Kehen met the stranger Brulo Anthony on the train. Anthony offered Kaihen an exchange of killing games. He wants Kaihen to kill his father, and he helps Kaihen kill his wife. Anthony's remarks made Kehen very terrified, and he quickly left the train.
Later, Kaihen's wife was really killed. Anthony found the lighter that Kaihen lost on the train and used this as a threat to let him kill his father. Under Anthony's bitter pressure, Kaihen had to kill Anthony's father. Kaihen, who had not attempted to kill, just told the truth about the matter to the person who slept in the bed. He thought it was Anthony's father, but he did not expect it to be Anthony himself. Knowing that Kaihen had no intention of killing people, Anthony was caught in a world of madness and revenge. He decided to throw the lighter at the death scene of Kaihen's wife in order to blame him. Although Kaihen recognized his intention, he must go to an important game. Anthony accidentally dropped the lighter into the ditch. When he found the lighter, he found Kahen was beside him.
