The lifestyles of Bodie and Doyle, top representatives for Britain's CI5 (Criminal Intelligence 5), along with their controller, George Cowley. CI5's mandate was to fight terrorism and crimes that are similar. Cowley, a tough ex-MI5 operative, hand-picked his men each. Bodie is a cynical ex-SAS paratrooper and mercenary whose nature conducted to controlled violence, while his partner, will be more of an open minded liberal, and Doyle, comes from the police to CI5. Their relationship is controversial, but they're the people to whom Cowley assigned to the toughest cases, and the men within their own field.