Despite his global fame and championship belts, years of intense beatings in the ring have left Rocky Balboa with potentially debilitating brain damage. To make matters worse, his fortune has been squandered by a shady financial advisor - sending Rocky, wife Adrian and son Robert back to their old Philly neighborhood, where they're forced to start all over again. Taking himself out of the ring, Rocky decides to train up-and-coming boxer Tommy "Machine" Gunn, a young talent whose loyalty is tested by an unscrupulous fight promoter.

