Tim McGuerin and Eddie Corbett operates a big taxi-fleet company together and because of a misunderstanding Tim's wife Sadie thinks he is having an affair with his secretary, Ms. Lucy Gibbs. To annoy Tim, Sadie starts taking classes with a fitness instructor, Samson, and later going with him to his out-of-town health club. To sort out all the misunderstandings both Tim and Eddie go to the health club as well.

• Comedy