Herman (a mouse) and Henry (a rooster) notice a poster that will award $1,000 to anyone who will stay in the ring for one round against a champion boxing rooster. Herman goes to Henry, who is feeling really low about himself, as he is getting bossed and pushed around by his wife. One thing leads to another, and the scrawny Henry is going up against the Champ.

Scientist Jack Griffin is hoping to reverse an experiment he conducted on himself that made him invisible. But the experimental drug has also warped his mind, making him aggressive and dangerous.

To make money, a Los Angeles street-fighter goes to work for gangsters.