In this spoof on crime films, four would-be criminals manage to botch every job they plan. When they try to rob wealthy Billy Gordon (Terry-Thomas) they fail again. But the gang decides to kidnap his daughter.
A rich young society girl falls in love with a car mechanic. Her family is appalled and stops her seeing him. The girl attempts to commit suicide and then decides to elope.
Aldo is gallantly conning wealthy widows - until he falls in love with baroness Sandra. To support her Aldo devises an ingenious swindle that relieves his string of widows of unheard-of sums so Sandra will love him back and marry him.
In the Irish village of Rathbarney, the aged squire is killed while hunting. His successor, O'Leary arrives in Rathbarney to take over his dead great uncle's estate.
A gambler falls in love with a naive young girl. He thinks she is bringing him good luck. Then his main gambling rival arrives and he desires the girl as well.
A British sanitary engineer accidentally takes plans for a secret weapon on vacation thinking they're plumbing designs. Russians recruit him for the plans. He falls for a Russian agent, unaware the plans are for a dangerous weapon.
