A brief meeting between a man and a woman on a night train. A meeting that remains a mystery to the man for the rest of his life.

Marcus and Mike are forced to confront new threats, career changes, and midlife crises as they join the newly created elite team AMMO of the Miami police department to take down the ruthless Armando Armas, the vicious leader of a Miami drug cartel.

Beatrice Prior must confront her inner demons and continue her fight against a powerful alliance which threatens to tear her society apart.