Despite Creed's proclamation otherwise after their match ended, he has challenged Rocky to a rematch after the public backlash against the final decision declaring Creed as the victor. He publicly calls Rocky out, mercilessly taunting him through the media to take the challenge.
Rocky, feeling desperate to provide financially for his growing family, decides to accept the challenge. Adrian, fully against the decision, reminds him that he is not only risking his life, but his family, too. Though he struggles with the prospect, he ultimately feels he has no choice in the matter. Boxing is all he knows, and he feels that he has nothing else to offer in the means of providing for his family, even if it costs him his life.
Again the underdog, Rocky throws himself back into his training routine to prepare for the match, slowly gaining his confidence that he may indeed have a chance against Creed. Soon enough the two find themselves face to face in the ring for one final showdown. For Rocky, there is more than the championship belt to win (or lose). He is betting everything on this fight, including his life.