It's New Year's Eve, the last day of 1969. While Chief Constable Cullen desperately tries to get all four division chiefs of Thamesford Constabulary to bury their hatchets and make them get along with each other despite their animosity, a van load of tires worth several hundred pounds is stolen from the police compound. It's back to duty for the partying CID task force team. Their task - join efforts, catch the culprits and solve their last crime case in 1969.