Former n'er do well Willie Caine (Albert Salmi) is now a monk, Brother Thaddeus. He is involved in establishing a mission and boy's school on property owned by Judge Garth and Trampas and Steve Hill are helping to build the mission. A gang, including a former crony of Thaddeus', robs the train and Sheriff Abbott (Ross Elliott) locks him up as an accomplice. Thaddeus manages to escape and with the help of Trampas sets out to track down the gang and exonnerate himself.
