Two bank robbers - Michael Rennie and Cesar Romero - escape after a bloody heist in a small town and one of them - Romero - asks his accomplice to get his own daughter - Romero's one - a child he placed several years ago in a convent. But when they arrive, they both learn from the nuns that the little girl died in the meanwhile. Romero is of course devastated and the two hoods continue their escape journey. But not far. In a saloon, they have to gun fight against the posse after them. Rennie kills a man and both friends have to escape again, but Romero is wounded. So, they come back to the convent where the Romero's daughter lived and died.
The posse goes berserk when the sheriff and his bunch have to struggle against the nuns, who of course refuse to let the posse come into the convent to catch the outlaws.
I won't get any further, but, believe me, I as truly amazed by this surprising episode, with Rennie in a very unforeseeable character.