In this light-hearted wartime comedy, three WWII Navy men orchestrate a 4-day leave for themselves in San Francisco. Once ashore, they immediately set out to make it a swinging celebration - to last as long as possible! Chief among the party-bound is Commander Andy Crewson (Cary Grant). Desperate to keep the men on the straight and narrow, Lieutenant Walter Wallace (Werner Klemperer) commits the trio to becoming spokesmen at a local shipyard that's owned by a local tycoon. But before long, the rowdy Crewson is courting the shipmaker's voluptuous daughter (Jayne Mansfield) with hilarious results.