Vatsa sisään, rinta ulos!.

Captain Routa has to teach a civil defense class to the girls at a boarding school. He accidentally wanders into the shower room and tries to get out disguised as a cleaner, but ends up in the same bed as gymnastics teacher Marjatta. Private Pöntinen, who is dating the boarding school cook, has a blast when he gets his hands on Captain Routa's uniform.