Rosa, the self-serving wife of a small-town doctor, gets a better offer when a wealthy big-city man insists she get a divorce and marry him instead. Soon she demonstrates she is capable of rather deplorable acts -- including murder.

Joe O'Hara finds out he has a damaged optic nerve just before a boxing match for the title. He needs the money badly, so he doesn't delay the fight. The opponent discovers Joe's weakness and pounds on his eyes, causing him to go blind.

Expecting the usual loss, a boxing manager takes bribes from a betting gangster without telling his fighter.