A telephone call from a frantic Sergeant Cantelli to say that his nephew, Johnnie Oslow, is missing cuts short Detective Inspector Horton's sailing trip to France. Summoned back to the Isle of Wight, Horton learns that Johnnie has not shown up for racing during Cowes Week, as previously arranged. The investigation is ranked low priority by Horton's boss, Detective Chief Inspector Lorraine Bliss, who like others believes Johnnie has probably gone off...