After a young woman is coerced into prostitution and her brother framed for murder by an organized crime syndicate, retribution in the form of an ape visits the mobsters.

Married for 22 years, Mary Emerson treats her husband, John, more like a son than a husband. He is stung by her rebuffs and, therefore, succumbs to the youthful charms of Gloria Sanderson, whom he meets on a business trip. But just after he mails a letter to Mary telling her that he will not return, John finds Gloria in the arms of her fiancé.