Dempsey happens to be present at a casino when it is robbed and a security guard murdered. Spikings tells him to wake up Makepeace in the middle of the night and start their investigation.

Dempsey and Makepeace are shadowing Frank Egan, who has just got off Scott free on a murder charge. His next big job seems to involve 'a bird man' and 'haggis'. It leads to Makepeace posing as a floozy and Dempsey as a pilot.

A truck carrying studio equipment is hijacked. Then it turns out the contents were actually automatic guns meant for a group of Arab terrorists.

Dempsey takes the place of American hit-man Schwartz to infiltrate a gang of drug dealers who are lacing T-shirts with heroin. Little does he suspect that their main contact, Lei Shan carries a grudge against the real Schwartz. When Makepeace gets her hands on one of the T-shirts via one of her contacts, the undercover Dempsey finds himself forced to bump her off.

While trying to stop a extremist group who are trying to overthrow the British government by flooding the country with counterfeit money, Dempsey and Makepeace try everything in there power to stop them.

Makepeace poses as reporter Debby Smith to get close to hoodlum 'Marocco' Jack and ends up saving his life from a rival gang. Dempsey joins Marocco's gang by posing as an American driver called Andy Sallapuccio, whom they need to pull off two simultaneous jewel heists. Meanwhile Spikings is facing complaints from upstairs that might lead to SI 10 being shut down.

Makepeace gets injured while pursuing jewelry thieves with Dempsey. On her first day out of hospital, they run straight into a bank robbery and hijacking - and Dempsey is reluctant to put Makepeace in any kind of danger.

A police informant suffers a near-fatal beating and due to this Dempsey and Makepeace go on the trail of a vicious gang leader.