Jude Shelley, daughter of a prominent cabinet minister, had her whole life ahead of her until she was attacked and left to drown in the Thames. Miraculously, she survived. A year later, her family is now asking psychologist Alice Quentin to re-examine the case.

But then a body is found: an elderly priest, attacked in Battersea, washed up at Westminster Pier. An ancient glass bead is tied to his wrist.

Alice is certain that Jude and her family are hiding something, but unless she can persuade them to share what they know, more victims will come.

Because the Thames has always been a site of sacrifice and death.

And Alice is about to learn that some people still believe in it…