Henry Holland (Alec Guinness) is dining with a fellow Briton in a posh restaurant in Rio de Janeiro where he is well known. He relates a story explaining his presence in Rio. It seems he was an apparently unambitious London bank clerk in charge of gold bullion deliveries for over 20 years. He had a reputation for fussing over details and suspecting all cars he observed following the bullion van, but all in all appeared to be a man dedicated to his job and the gold's security. In fact, he had hatched the "perfect" plot to steal a load of bullion and retire. The one thing stopping him had been that selling the gold on the black market in Britain was too risky, and he was at a loss as to how to smuggle it abroad.

One evening a new lodger – artist Alfred Pendlebury (Stanley Holloway) – arrives at Holland's boarding house in Lavender Hill. Pendlebury owns a foundry that makes presents and souvenirs that are sold in many resorts, including foreign ones. Noticing how similar the foundry is to the place where the gold is made into ingots, Holland decides that the ideal way of smuggling the gold out of the country would be as Eiffel Tower paperweights sold in Paris, and puts this hypothetically to his new friend: "By Jove, Holland, it's a good job we're both honest men." "It is indeed, Pendlebury."

When Holland suddenly finds that he is about to be transferred to another department at the bank, he and Pendlebury quickly move into action. They recruit two petty crooks, Lackery Wood (Sidney James) and Shorty Fisher (Alfie Bass), to help them carry out the robbery. The plan is simple but clever, and it succeeds: Wood and Fisher carry out the hijack of the bullion van and switch the gold to Pendlebury's works van. Holland, who is supposedly assaulted and almost drowned in the robbery, becomes the hero of the hour. The police find themselves running around in circles, unable to track down the "master criminal" who is in fact right under their noses giving them false statements and misleading clues. Meanwhile, Holland and his associates melt the gold in Pendlebury's foundry and export it to France disguised as miniature Eiffel Towers.

The plan goes wrong when the woman running the souvenir kiosk in Paris misunderstands her instructions due to a language mixup – the box of gold towers is marked with an 'R' (for 'Reserve') but she assumes she has to keep back any boxes marked 'A', which in French sounds like the English pronunciation of 'R'. Instead of holding back the specially-marked box of Eiffel Towers, she opens it and puts them out for sale. Pendlebury and Holland, who have adopted the names of "Al" and "Dutch", arrive to retrieve their disguised bullion only to find that six of the towers have been sold to a party of British schoolgirls. A wild chase back to Calais and the Channel ferry Canterbury follows but hold-ups to buy tickets and negotiate passport, customs and currency controls prevent them from boarding the ship carrying the girls in time.

If just one of those towers is found to be gold then the game is up. Pendlebury and Holland therefore track down the schoolgirls and, in exchange for a similar tower and ten shillings apiece, recover most of the loot. One girl however refuses to return hers since she intends to give it to a friend who is a policeman. The girl delivers the souvenir to the officer, who is at an exhibition of police history and methods at Hendon Police College. Also attending is a police inspector who is investigating the robbery. As part of the case he checked up on Pendlebury's foundry and was told that many souvenirs bought in foreign places are actually made in Britain. A sudden thought occurs to him and he orders the souvenir to be tested. At that moment Pendlebury snatches it and he and Holland make their escape in a police car.

A confused pursuit then takes place through London, with Holland using the radio in the police car they have stolen to divert the pursuers to a different car. Eventually, though, an officer succeeds in stopping their car and arresting Pendlebury. Holland escapes to Rio de Janeiro with the six gold towers, worth "£25,000, enough to keep me for one year in the style to which I was, ah, unaccustomed." But now, he finishes telling his visitor, the money is mostly gone. As they leave the restaurant, Holland is seen to be handcuffed to his countryman.
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== osoby ==			== profese ==
	Michael Balcon		Producent

cena	festival	ročník	osoba	nominace/cena
Nejlepší britský film	BAFTA	5 (1951)	Michael Balcon	cena
Zlatý lev za nejlepší film	Benátský filmový festival	16 (1951)	Michael Balcon	nominace
Nejlepší film z libovolného zdroje	BAFTA	5 (1951)	Michael Balcon	nominace