Barry is detained for questioning while the rest of the lads return to the UK courtesy of the British Consulate in St Petersburg. A Russian crime lord, whose mansion they have been working on is blown up just as they are finishing the job. But their brush with the Diplomatic Service prompts them to sign up with OED, the Government department that handles building contracts for British Embassies all over the world.
The lads start work refurbishing a large derelict property to become the Ambassador's new residence. Wyman has a very memorable experience on their first night out on the town in Havana. The next evening, at a drinks reception for the Cuban National Ballet Company, Neville finally meets his contact and Oz finds himself strangely captivated by the Prima Ballerina.
Neville's contact gives him a ticket for the boxing event, while Oz makes a date with the Prima Ballerina and Wyman joins the Embassy Scuba Club. But before any of them can make their appointments, the lads have to pick up an old bath for the Ambassador's new residence.
Neville makes a new friend, Wyman starts seeing a girl from the Embassy and Oz persuades the others to help renovate his Cuban girlfriend's home. However, Dennis begins to feel everyone's avoiding him, and his suspicions are further aroused when the work-rate on the site drops off.
Barry has been arrested after the car crash, but now the authorities begin to suspect he could be a spy. Oz's relationship also attracts special attention, Wyman's mother turns up unannounced and Neville has a secret mission.
Following a riot in the African country where they are working at an embassy, Oz sustains an injury to his backside whilst sheltering a female embassy official with whom he has been having sex, from a bomb. The group gets air-lifted and ends up in Laos to undertake more embassy work. However Bomber has stayed behind in Arizona with his new family and sends his greetings to his colleagues.
Barry is reunited with Tatiana, his Russian wife, who has come out to Thailand for a reconciliation but soon afterwards he is kidnapped and a ransom of 100,000 dollars demanded. A man claims to know where he is being held and drives them to a village but then they are all kidnapped by local guerillas. However they steal the guerilla leader's phone and summon help, discovering that the brains behind the plot is spymaster Tarquin, whom they met in Russia. After such excitement they are glad to resume work in a peaceful location, returning to Germany.