It was meant to be a harmless stag night, but a few hours later Michael Harrison has disappeared and four of his friends are dead. With only three days to the wedding, Detective Superintendent Roy Grace, haunted by the memories of his missing wife.

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

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.

When a body is dredged up from the sea, it sets in motion a disturbing investigation which forces Grace to ask himself how far will might go to save the ones they love.

When a series of chilling attacks in Brighton all bear the same signs, Grace has a feeling he's seen this before. Is it a copycat, or has an offender from Grace's past resurfaced?