Is there a killer on the Cornish coast? When a high-profile case hits D.I. Rachel Morrison's desk, she's faced with no leads, no witnesses, and no body. Local people have gone missing, and the pressure to find answers is mounting. Amanda Walker's mother has vanished without a trace, and Amanda, desperate for answers, turns to a mysterious, underground group she believes is responsible. With time running out, D.I. Morrison races to uncover the truth...