The full plot of Rocky (1976) runs from a lonely club fighter to a fifteen round title fight that he loses on the scorecards but wins everywhere else.
Rocky is awkward and lonely, yet he has a soft spot for Adrian, who works in a pet store. Her brother Paulie, Rocky's friend, arranges a date, and Adrian slowly warms up to him. When Apollo Creed loses his planned challenger to an injury, he decides to give an unknown local fighter a shot as a showpiece. He chooses Rocky because of the Italian Stallion nickname, and promoter George Jergens sets a purse of $150,000.
Rocky trains in rough, makeshift ways, including punching slabs of beef. Mickey offers to coach him, and Rocky reluctantly agrees. Paulie wants to be part of the corner team and grows jealous, and Rocky smooths things over by promoting Paulie's employer.
The night before the fight, Rocky admits to Adrian that he does not expect to win. His real aim is to last all fifteen rounds, which no one has done against Apollo. On New Year's Day, Apollo makes a showy entrance, and Rocky knocks him down in the first round. Apollo then fights seriously, and both men take heavy punishment over the full distance. Rocky's eye swells nearly shut and has to be cut open so he can see.
After the final bell, Apollo says there will be no rematch, and Rocky says he does not want one. Rocky calls for Adrian, who joins him in the ring. Jergens announces that Apollo has won by split decision, but Rocky and Adrian embrace and tell each other they are in love, paying no attention to the result.