In Harry (Robert Downey, Jr. Robert Downey Jr. (acted the role of) in the narrator, this story with black humor begins. He was originally a habitual thief with a lot of bad luck, because he broke into the talent show of Hollywood movies to avoid being pursued by the police. It can be said that the director immediately took a fancy to Harry and asked him to go to Los Angeles for role training. Harry inexplicably became an "would-be actor" and he will play a detective. The crew specially arranged for Harry to go to the real detective Perry (Val Kilmer Val Kilmer) to experience the real detective life. A murder awaits their investigation, and the dead is a woman. Harry suffered a lot from this thrilling life, because the ruthless Perry was not an easy partner to deal with. Meanwhile, Harry meets his dream lover Hamoni (Michelle Monaghan Michelle Monaghan) at the party. She has been crawling around Hollywood, but she is still not well-known, and now her sister has committed suicide mysteriously. In order to win the hearts and minds of the people, Harry began to investigate the matter, then slowly found out.