A small-time Philadelphia boxer gets a supremely rare chance to fight the world heavyweight champion in a bout in which he strives to go the distance for his self-respect.
 
A knockout.
 
FUN FACT:  Most of the scenes of Rocky jogging through Philadelphia were shot guerrilla-style, with no permits, no equipment, and no extras. The shot where he runs past the moored boat for example, the crew were simply driving by the docks, and John G. Avildsen saw the boat, and thought it would make a good visual, so he had Sylvester Stallone simply get out of the van and run along the quays, while Avildsen himself filmed from the side door. A similar story concerns the famous shot of Rocky jogging through the food market. As he runs, the stall keepers and the people on the sidewalks can clearly be seen looking at him in bemusement. While this works in the context of the film to suggest they're looking at Rocky, in reality, they had no idea why this man was running up and down the road being filmed from a van. During this scene, the famous shot where the stall owner throws Rocky an orange was completely improvised by the stall owner, who had no idea that a movie was being filmed and that he would be in it.