Late night on a notorious high-rise estate in Hackney and a white van is being driven erratically. The driver is pulled over by the police and questioned.

A woman on the street after a long evening's drinking... She never makes it home.

A suspect... an arrest... a confession... A case done and dusted?

Five years earlier, a 13-year-old girl disappeared in broad daylight on a busy London street. DCS James Langton headed the investigation; the case was never closed. It has haunted him ever since.

And now comes another confession, to this murder, and to one more besides. Too good to be true? DCI Anna Travis, pulled into the fray, isn't so sure that they have their man. Then the suspect changes his story...