Feisty Detective Sergeant Kate Lewis is back and this time she needs all her wits about her as she takes on one of the most gruelling and risky investigations of her career. The body of missing London journalist Ellie Landy is found floating in the River Parrett by a news crew covering a story on the worst floods the Somerset Levels have suffered in living memory. At first, the local police assume they are dealing with an accidental drowning. But as Kate disobeys orders from the top and continues to delve into the incident, it soon becomes apparent that there was nothing accidental about what happened to Ellie. Following the death of another young woman in suspicious circumstances, Kate finds herself drawn ever deeper into a nightmare world of murder, treachery and perversion - a world which promises to deliver her up as its next victim...?.