Detectives Mike Lowery and Marcus Brunette (Smith and Lawrence, respectively) have 72 hours to find $100 million worth of heroin before Internal Affairs shuts them down. Lowery becomes more involved after a friend is murdered by the drug dealers. Matters become complicated when Lowery and Brunette have to switch places to convince a witness (Leoni) to the murder to cooperate. Lowery becomes more involved after a friend is murdered by the drug dealers. Matters become complicated when Lowery and Brunette have to switch places to convince a witness (Leoni) to the murder to cooperate.