Sylvester Stallone's iconic boxer steps back into the ring for one final shot at glory in the belated final entry into the long-running film series that shot the popular action icon to superstardom in the mid-'70s. Rocky Balboa has long been retired from the sport of boxing, though after suffering a devastating personal tragedy and being personally challenged by a formidable up-and-comer, the aging prizefighter vows to get back in shape and defend his standing against a new breed of fighter whose powerful pugilistic skills threaten to tag a grim coda onto Balboa's enduring legacy.