Skelettet af en ung kvinde bliver fundet i midterrabatten af en motorvej. Hvem var kvinden, og hvordan kom hun af dage? Politifolkene Cassie Stuart og Sunny Khan går på jagt efter svarene. Samtidig, rundt omkring i England, går livet videre for fire gamle skolekammerater. Ingen af dem aner, at de snart kommer i politiets søgelys.

Cassie and Sunny go in search of Hayley's family as the press begin to take an interest in the story. A detective who was involved in the original investigation offers his thoughts on why her disappearance remained unsolved, pointing out that Hayley's boyfriend was suspected of the crime but was never charged. The distance between where Hayley was last seen and where her body was found leads Cassie to form a new theory - that the killer may have travelled up from London, then returned before they could be questioned.