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A body is found on a beach in North Devon. DI Matthew Venn and his team search for a way into a case that has no witnesses, no forensics and no motive.

Matthew and the team continue to hunt for clues about the victim, and uncover secrets from the past and theorise who might have motive to murder. Connections are made between the victim and the Brethren community when it's uncovered that the victim had started attending meetings, while, closer to home, Matthew and his mother look to build bridges after years of silence.

The prospect of rebuilding a relationship with his mother blurs Matthew's ability to objectively examine the Brethren community, and he wrestles professional and personal issues to solve the case before anyone else gets hurt. Lucy and Gaby can no longer stay quiet as an important silence breaks and the extent of the lies suffocating the communities continues to widen.

Despite key breakthroughs, the team are frustrated until an important piece of evidence sets Matthew on the path to finding the murderer. Matthew finds clarity on the true events surrounding the murder at Crow Point and has a chance to solve the case with the killer in his sights, but he must be careful knowing someone else is in danger.