A pair of "golden" partners of the Miami Police Department, Binna (Martin Lawrence), a good family and loving wife, and Laurie (Will Smith), a well-dressed and suave rich boy, are ordered to investigate a theft of drug evidence worth hundreds of millions of dollars. If the task cannot be completed in time, they will have to pack up and leave. As the two men were exhausted, the only sexy female witness in the case called the police station and claimed that she was willing to identify the mastermind, on the condition that Laurie had to come forward to protect her, otherwise everything was off the table. At this time, Laurie happened to be not in the police station. In order to obtain clues, Binna acted in a hurry and pretended to be a person. Later, in order not to lose the trust of the female witness, the two had to carry out the exchange of identities to the end. Binna protected the female witness closely during the hail of bullets and car chases, while Laurie came to his home to accompany his wife.