A Major noted for advancing with his mouth before thinking is given a choice: to be drummed out of the Army, or take command of and shape up the ROTC program at Sheridan Academy before it fails its next inspection. At Sheridan he encounters three hundred pre-teen cadets who range from rascally to adorable, and a female doctor who has just the right prescription for him.

Herman discovers he's the new lord of Munster Hall in England. The family sails to Britain, where they receive a tepid welcome from Lady Effigy and Freddie Munster, who throws tantrums because he wasn't named Lord Munster. An on-board romance had blossomed between Marilyn and Roger, but on land Marilyn discovers Roger's family holds a longstanding grudge against the Munsters.