Bulman, now promoted to Detective Chief Inspector, isn't too happy with his new job. He feels he's becoming office-bound - but he's soon caught up in a string of murders which present him with some intriguing facts.
A convict makes a daring prison break but leaves a trail to ensure his recapture is handled by the inter-city squad. He has an old score to settle with Lambie,the squad's supervisor.
A routine assignment - escorting a prisoner from Glasgow to London - turns into something altogether different when the woman escapes and her escorts on a merry cross country chase.
Bulman and Willis arrest a man carrying an incriminating roll of film. This triggers off an enquiry which takes them to Edinburgh and an gang specialising in political blackmail.