Henry Holland ( Alec Guinness) is a clerk at the Bank of England. Because of his perfect record and self-effacing manner, he is considered thoroughly trustworthy and is even assigned to accompany shipments of gold. In reality Holland has a carefully hidden desire to commit the Perfect Crime, and is waiting for the big chance. The big chance comes when he befriends another frustrated man, Pendlebury (Stanley Halloway) who has the foreign connections that Holland needs.
The result is a hilarious parody of the traditional gangster movie, which plays all the traditional tropes for laughs --... read the rest.