June 1960. Rough weather at sea leaves a group of strangers stranded on the idyllic Greek island of Utakos, all guests of the only local hotel. Edith Mander, a quiet British tourist, is found dead inside a beach cabana. What appears at first glance to be a clear suicide reveals possible signs of foul play to Ormond Basil, an out-of-work but still well-known actor who in his glory days portrayed the most celebrated detective of all time. Accustomed to seeing him display Sherlock Holmes’ amazing powers of deduction on the big screen, the other guests believe that the actor is the best equipped to uncover the truth. But when a second body is discovered, there is not a doubt in Basil’s mind: a murderer walks among them. What’s more, the killer is staging each crime as a performance, leaving complex clues that bear an eerie resemblance to those found in the pages of Arthur Conan Doyle stories.