The standard story of Robin Hood: Evil Prince John is oppressing the people while good King Richard is away on the Crusades. Robin steals from the tax collectors, wins an archery contest, defeats the Sheriff, and rescues Maid Marian. In this version, however, Mel Brooks adds his own personal touch, parodying traditional adventure films, romance films, and the whole idea of men running around the woods in tights. 

 
http://www.imdb.com/title/tt0107977/