Seaminster Police Chief Maurice Kendrick has moved from grudging acceptance of the help of the Peter Piper Agency to approaching it as plain Mr Kendrick, concerned about his niece's involvement with a local sect that promises life after death. While Phyllida Moon as the affable Miss Lubbock is beginning her investigation, two of the sect's young acolytes leap from a cliff into the sea. Suicide? Or murder? Worse is to come. At a meeting of the sect, held at his family seat, the charismatic leader falls dead. The public suicide his flock has been half awaiting? Or, again, murder? Kendrick the policeman investigates potential suspects, chief among them the wife, the sister, and the business manager, all of whom seem to have good reason to wish him gone.