For fans of Gillian McAllister and Lisa Jewell comes a powerful and haunting novel about family, secrets and murder.Is blood thicker than water?At 5am one summer's morning, police diver Jen Harper wakes to find herself submerged in the silt of a river with no memory of how she got there.Forty-eight hours later, she's called to dive in the same river in search of a missing woman, Claudia Franklin.But for Jen, this is no ordinary job. Her and Claudia's families were entangled for decades - there is unresolved resentment between them, unspoken secrets.Jen hasn't seen Claudia for twelve years now. Or has she?