The film starts with a series of farces caused by the accidental identity swap of two men who had nothing to do with each other. Xu Yi was originally a hobo in Thailand’s Chinatown, who attributed his failure in life to luck and always complained about others. By chance, he swaps identities with jeweler Longshan and becomes involved in a fight between Longshan and the criminal gang Skull Buddha.
Xu Yi eventually chooses to stand on the side of justice and brings the Skull Buddha gang to justice together with Longshan. He also recognizes his own flaws under the influence of Longshan and decides to face life with a positive attitude instead of complaining negatively even when he is at a low.