A gunslinger known as The Man Called Noon (Richard Crenna) loses his memory after being shot during a surprise attack.  As he searches for his identity, it becomes clear that he is on a mission to avenge the deaths of his wife and child. He meets and befriends outlaw R. B. Rimes (Stephen Boyd) and he receives comfort from a lady named Fan (Rosanna Schiaffino). Together, they try to piece together the clues and discover who shot him and just who he is. The villain proves to be Judge Niland (Farley Granger), and the trio go to extraordinary lengths to put him out of action.