Late November, 1980. English student Nick Hartley returns from a lecture to find his house full of police. He soon discovers that his ex-girlfriend has been found murdered in a nearby park, and her new boyfriend is missing. Nick quickly realises he is a suspect as he has no convincing alibi, but Nick has his own suspicions. Meanwhile, in late November 2019, an archeological dig near Scotch Corner unearths a skeleton that turns out to be far more recent than the Roman remains she is looking for. Detective Superintendent Alan Banks and his team are called in, and the investigation into the find begins.