Grace senses a connection between a single death and the discovery of human remains in a field. But his superior is not convinced.

When a body is dredged up from the seabed of the English Channel, it sets in motion a truly disturbing investigation which forces Grace to ask himself just how far anyone might go to save the ones they love.

Months on from his last investigation, and with Grace's team still reeling from the fallout, Roy must prove that a wealthy Brighton businessman has brutally murdered his wife.

A sinister inquiry into skeletal remains found in a forgotten Brighton storm drain takes Grace down a labyrinthine trail through the past.