Jack Donovan, a pitcher for the Chicago Cubs, refuses to throw a game for gambler Mike Moran. Moran retaliates by breaking up Donovan's family. Believing that his wife and son died in the sinking of an ocean liner, Donovan stays in baseball and, 20 years later, becomes manager of the New York Giants. What he doesn't know is that his family isn't dead and his son, Jack Jr., is now grown and looking for revenge against his father for what he believes was his abandonment of them.