Classic Ealing comedy. During the Second World War, the inhabitants of a small Hebridean island are wilting under a chronic shortage of whisky. When a ship is wrecked on the shore, it is discovered to contain 50,000 cases of malt, which are promptly appropriated by the menfolk of the island. All is well until an English Home Guard commander - determined to see the whisky restored to its rightful owners - calls in Her Majesty's Customs, and the islanders make frantic attempts to hide their treasured alcoholic booty!