It’s election day 1997, and Ben Ransley - the researcher for the Labour MP Liz Jackson - is dead; murdered under Westminster Bridge. Ben’s jaw is broken, there’s no CCTV images or witnesses of the crime. He leaves the celebrations and never returns... The case is reopened due to the discovery of an offshore account with £40,000, and no one close to Ben knows where it came from. There’s a picture of a blond woman in his wallet but none of Ben’s family or friends recognise the mysterious woman...