Detective Mike Lowrey (Will Smith) and Detective Marcus Burnett (Martin Lawrence) return for the third and final chapter in the Bad Boys saga. The boys, now middle-aged men, are reevaluating their lives and goals for the future as they head into retirement.
Prison warden Bernadine Williams (Alfre Woodard) has been in charge during eleven death row executions, and the stress of carrying them out has taken a great toll on her emotional and physical health. As the execution date for another inmate approaches, Bernadine gets to know him.
After losing his wife seven years earlier, the eccentric Dr. John Dolittle (Robert Downey Jr.), famed doctor and veterinarian of Queen Victoria’s England, hermits himself away behind the high walls of Dolittle Manor with only his menagerie of exotic animals for company.
Stéphane has recently joined the Anti-Crime Brigade in Montfermeil, in the Paris suburbs. Alongside his new colleagues Chris and Gwada - both experienced members of the team - he quickly discovers tensions running high between neighbourhood gangs.