Marty (Colin Farrell Colin Farrell) is a drinking screenwriter, while his friends Billy (Sam Rockwell Sam Rockwell) and Hans (Christopher Walken Christopher Walken) make money by stealing the dog and returning it to the owner. Marty recently wrote a screenplay called "Seven psychopaths," but he didn't have much inspiration, so Billy provided him with some material. There is a psychopath is a killer, every time he kills a person will drop a J playing card, there is a Vietnamese Avenger, there is a Quaker who cut his own throat. Billy stole a dog, which is the pet dog of a gang boss Charlie (Woody Harrison Woody Harrelson). Charlie lost the dog he regarded as life and looked for it everywhere. He found Hans's wife in hospital and killed her. When Billy knew about this, he angrily killed his lover, who was also Charlie's lover, and Billy dropped a playing card.