When human remains are found buried near a London motorway, Cassie and Sunny begin the task of identifying them.
The search for what happened to Hayley begins as the team travel down to Middenham to meet her family.
Cassie and Sunny begin interviewing the four male occupants of the holiday home over the millennium, who all have fairly consistent accounts of the time spent in there.
Cassie and Sunny suspect that the men all colluded in lying about their version of events for that evening, but why?
Cassie and Sunny finally get closer to some truth about the night Hayley disappeared and the case takes a devastating turn for Cassie.
Under the glare of media spotlights, the team race to find the evidence to prove the identity of Hayley’s killer.