Burnett quarreled with his partner, left the Miami police service and engaged in private detective activities. Lowry, meanwhile, is experiencing a midlife crisis and is considering engaging in a bachelor lifestyle. In parallel, he has to deal with a new arrogant partner. The 'bad guys' have to reunite when an Albanian mercenary begins to hunt for them, who wants to avenge the death of his brother. To survive, former partners must forget about old grievances.