The hellions at St Trinian's School for Girls are up to their usual shenanigans as they blackmail a diamond thief, forcing him to pose as headmistress to "chaperone" them on a Continental romp to meet a marriage-minded Italian prince. Featuring beloved British thespians Alastair Sim, Terry-Thomas and Lionel Jeffries, the film is the second in a series of four outrageous comedies that follow the antics of St. Trinian's young mischief makers.