Within hours of Annie Borjesson's body being found on a Scottish beach, her family are told it is suicide. However, they believe the evidence points to murder.

Hazel pieces together the mysterious final hours before Annie was found dead. She hears an extraordinary theory that Annie’s death was a state-sponsored hit job.

Hazel explores the conditions at Prestwick beach. Did Annie really drown herself there? Remarkable forensic evidence suggests otherwise.

Hazel gets access to a new source of information and makes a series of disturbing discoveries which shed new light on what happened to Annie.