After an unsuccessful attempt is made on his life, Noon (Richard Crenna) wakes up with no recollection of his past or identity, retaining only his gunfighting prowess. With the help of outlaw Rimes (Stephen Boyd), Noon learns he had a wife and child who were killed, and that the attack on him was made in an attempt to get his hidden treasure. When he discovers that greedy Judge Niland (Farley Granger) is the culprit, Noon sets out to avenge his murdered family.