Butch Cassidy and the Sundance Kid have given up robbing banks and trains in favour of settling down as ranch owners and waiting to hear from the Governor of Wyoming about a possible pardon. Then they have an unfortunate encounter with Luther Greeley, an outlaw from a rival gang, during which Sundance is badly wounded. As a worried Butch watches over his injured partner, he thinks back to their first meeting when they were young, and how it all began...