Playing Life, one of the twin brothers, was separated from his parents when he was a child, and was raised by a dancer, who spent his days at the bottom of the social ladder. In order to help his brother Tarzan pick up girls, he befriends the singer Barbara, and at the same time offends his triad boss. At this time, his twin brother, Ma You, returns to Hong Kong for a solo recital, and the two of them meet unexpectedly, and by mistake, the two of them swap roles, with Playing Life playing the role of the gentle Ma You, who amazes the audience at the piano recital.
28 years ago, a couple gave birth to a pair of twin brothers in the hospital, who happened to be just sent to the hospital emergency bandits hijacked, this pair of twin brothers were separated. One was picked up by a dancer and raised, named Playing for Life (Jackie Chan), who spends his days wandering around the bottom rungs of society; the other, named Ma You (Jackie Chan), followed his parents to the U.S., where he received a higher education and grew up to become a famous musician. Playing life to help his brother Tarzan pick up girls, met the songstress Barbara (Maggie Cheung), but also offended the big brother of the triad society, and at this time, Ma You returned to Hong Kong to hold a solo recital, acquaintance of the family of the Shibe's daughter, Tang Xin (Li Zhi); perhaps it is fatalistic, or perhaps it is a coincidence, the two so unexpectedly met, in the error, the two people switched roles, and each into each other's lives; Playing life to play the role of the mild-mannered and elegant Ma You, in the piano recital surprised the audience; and Ma You but instead of playing life, under the coercion of the gangsters, driving to save the mob boss escorted by the police; unexpectedly, the concert played life's nonsense finger waving surprisingly successful, when the gangsters captured the life of the brother of Taishan, in order to rescue the sweetness and bitterness with the **** of Taishan, the two brothers have finally come together.