Mike's career hangs in the balance when a former racing driver dies in police custody while in his care and the racers cousin accuses him of murder. Forced to suspend his officer, Nick teams up with Detective Inspector Shiner to investigate and clear his officer's name, but he is shocked when he realises Mike isn't completely innocent. Meanwhile, Greengrass and Bernie Scripps buy an ex-police car from a car auction and start up a taxi firm. Via the old radio, they tune into police frequencies and overhear events at Ashfordly station, while Aunt Eileen bids farewell to Aidensfield for a new life in France.

A young girl ends up in hospital after a series of burglaries causes tension to boil over between her family. As the team try to deal with the fallout, Nick receives a job offer that would mean emigrating to Canada. Meanwhile, Greengrass enters the art world when he meets artist Moira Hamilton, who is making sculptors of rural decay with his old car parts and who agrees to paint a portrait of him. He and Bernie try making sculptor, but Bernie proves to be more talented than Greengrass.