Branson and Grace investigate the murder of socialite and patron of local charities Katya Bishop, whose entrepreneur husband Kit becomes the main suspect. The Bishops seem to have led a charmed life, until Grace digs deeper behind the respectable facade and discovers all is not what it seems. Doing so, however, places him unknowingly in grave danger.

A body is dredged up from the English Channel, setting in motion a truly disturbing investigation that forces Detective Superintendent Roy Grace to ask himself just how far someone might go to save the ones they love.