Detective Lauren Pengelly investigates a woman's bones found behind a derelict cottage in Penzance, which turn out to be twenty years old. On the same day, a girl called Isla is kidnapped from her nursery, prompting questions about a possible link between the two cases. Lauren and her second-in-command, Detective Matt Price, explore potential connections, including Isla’s estranged father's odd behavior. Their investigation gains urgency when another girl is abducted, leading to fears the kidnapper may not have any intentions of stopping.

In St Ives, Cornwall, after Freya Kempston fails to return home, Detective Lauren Pengelly and her team are tasked with finding her. Initial leads from mall security footage show Freya with a local mechanic, who denies knowing her. The case takes a grim turn as more women disappear, suggesting a serial predator's involvement. Lauren and Detective Matt Price discover a hidden connection among the victims, launching a race against time to find them alive.

The discovery of a young woman's body by the coast in Land’s End, Cornwall, draws Detective Lauren Pengelly and Deputy Matt Price to investigate. The victim, Sophie Bethany Yates, known around the docks, leaves clues that point beyond her suspected boyfriend, Samuel. The cryptic message found with her, and subsequently another victim, hints at a larger, more twisted motive. As Lauren unravels the dark truth surrounding the murders and Sophie's life, she realizes the killer is closer than they thought, putting everyone at risk.