Jack Spade returns home from the army to find that his brother has died of an overdose of gold chains - all provided by the nefarious Mr. Big. So Jack embarks on a mission to gather all the most famous 1970's action heroes (all accompanied by heroic theme music) to wage war against Mr. Big. But things don't go smoothly for Jack and his makeshift commandoes, and eventually Jack finds that he must face Mr. Big alone - and earn his own theme music.