In 1746 Mexico, a womanizing outlaw, the army deserter Leon Alastray (Anthony Quinn) is wounded and pursued by the Spanish military into a church. He is given sanctuary by a sympathetic priest (Sam Jaffe), who will not turn Alastray over to the military. The church authorities side with the army, and when the priest still refuses to hand Alastray over they send him to minister to a remote village, San Sebastian. The priest smuggles Alastray, who is proudly atheistic and anti-clerical, past the soldiers surrounding the church. Alastray feels guilty for what has happened to the priest, so accompanies him to the village to ensure he gets there safely. However he is angry and embittered throughout the trip.