DI Horton of Portsmouth CID is assigned the case of a missing person: Jasper Kenton, a private investigator. Kenton’s partner seems reluctant to help them, and Horton concludes that she is probably relieved to be rid of him. He instructs Sergeant Cantelli and DC Walters to put out the usual alerts, believing Kenton has probably run off with another woman. But when Kenton’s car turns up, and a shocking discovery is made, things turn serious. Immediately, Horton finds himself embroiled in an investigation that has major personal ramifications and one in which he has no choice but to withhold vital information.