Pre-Hayes Code Morality Flick **Spoiler**
I can see how this film would've had to be rewritten if it had been produced post-Code instead of pre.
[The first rule of the Hays Code stated: No picture shall be produced that will lower the moral standards of those who see it. Hence the sympathy of the audience should never be thrown to the side of crime, wrongdoing, evil or sin.]
Bill is a philandering and hard-drinking locomotive fireman with little ambition in life other than having a good time and dating lots of gals.
Jack is a hardworking married man with a nice little home, an adoring wife and ambitions to rise as far as he can, to the railroad's General Manager if possible.
Yet in the film -- largely thanks to his longtime buddy Bill -- Jack loses EVERYTHING. His marriage is ruined, then he causes a train wreck, is blinded, loses his job and, ultimately, his life.
Months later, Bill meets Jack's widow by chance. Done mourning, she's ready to start all over. The way she makes eyes at Bill, and given his triumphant reaction, it's obvious she's going to start all over with him
So the good guy loses everything, the drunken lout gets it all.
Not the way we think of a Hollywood ending. But for a while, in the early 1930s, that kind of reverse morality play was quite possible on the silver screen.