Nightclub entertainer Hap Smith has a new act since his former partner Chick Allen joined the army. With his lovely new female partner, Hap now plays a clownish parody of a soldier. When Chick organises a soldier show at Fort Benning, he realizes he needs his former partner's help—so, to get onto the base, Hap impersonates a hapless real soldier, but circumstances force them to prolong the masquerade, creating an increasingly tangled Army-sized SNAFU.