 When the absentminded Professor Osrick Purehart (Bentine) leaves a secret military formula in the store, mayhem ensues as two suspicious secret agents (actually enemy spies), who have been shadowing the professor, question Harry regarding the professor, none of them realising that Harry now has the formula in his possession.Convinced by the two spies to follow the professor, Harry goes to an Army post, Camp Warwell, where he is mistakenly enlisted in the Z Men, ostensibly an elite unit guarding atomic secrets but in reality a ragtag group of reservists, retreads, and others of marginal (at best) competence.The spies kidnap an adjutant newly assigned to the camp and one of them then impersonates him to gain entry to Camp Warwell.