On a wintry night in December 1985, 19-year-old Alison Day goes missing after getting off a train - and her disappearance turns into a murder hunt.

Police desperately try to find the two men responsible for the sadistic murders of Maartje Tamboezer and Alison Day.

In 1997, nine years after John Duffy has been sentenced to life for murder and rape. But he wasn't alone in these crimes, and after almost a decade of silence, he starts to talk.