"Hell's Heroes" is the 1930 adaptation of the western novel "The Three Godfathers", which has been made into more movies than you'd think. Several have been made under the original title, and "Ice Age" is another version of the same story.
So what is the story? 3 bad men rob a bank in a western town called New Jerusalem, on Christmas eve. Chased into the desert by the townspeople, they manage to escape, and plan to fill up on water at a little used well. However, the well had been blown up by a tenderfoot crossing the desert, who's wagon broke down and who's wife was near to delivering their child. The three bandits find the woman, who has given birth and is dying. Delirious, and thinking the badmen are friends from town, she asks them to take the baby to New Jerusalem to her family. Of course, these men CAN'T do that, but they do take the baby and one of them buries the woman after she dies.
Now saddled with an infant, and low on water, the men are desperate. The three are a dumb but friendly ranch hand type, an older, kinder world-knowing fellow, and a seriously bad hombre who'll throw the baby into a pit of rattlers if it will help him get away. The remainder of the movie is how the presence of the helpless baby and a promise made to a dying mother pricks the conscience of the three and what they do in the end.
"The Three Godfathers" starring Chester Morris (as the BAAAAD guy), is the best version under the original name. Morris character has no heart, no compassion and no sense of fair play, making the ending of this film all the more watchable and exciting.
Buy this DVD for the historic value and to see two amazingly good films made from the same story, but with greatly different casting, direction and writing.