In the blink of an eye, 30 years have passed, and the glory of the past has gradually disappeared. The former legendary boxing champion Rocky (Sylvester Stallone) lived a dull and boring life. His beloved wife Adrian (Talia Shire) died of cancer. His relationship with his son was extremely tense. He sat in the small restaurant he opened all day long and reminisced about the past. No one would have imagined that the boxing champion's life after retirement would be so lonely. At that time, a new generation of boxing champions was born, and the young Mason Dixon (Antonio Tarver) ruled the heavyweight championship title. Polly (Burt Young), who works on the Sports Channel, has an idea and plans a century-old showdown between the new and old generations of boxing champions. Mason is eager to prove his strength to the boxing fans in the game, while Rocky hopes to feel the fanatical atmosphere of cheers and shouts here. They return to the ring with their respective wishes...