When beautiful French actress Sabine Durand mysteriously disappears, Rex Graves flies to the Caribbean paradise of St. Martin to investigate. But no one told the Scottish barrister that the island's white sand beaches would be filled with people walking around starkers. Apparently, Sabine was staying at an exclusive nudist resort. Not even a few pints of Guinness can prepare Rex for all the brazenly exposed body parts he encounters. Keeping his gaze well above the shoulders, Rex interviews Sabine's friends. It seems everyone has something to hide-from her rich older husband to the sexy self-made millionaire to Monsieur Bijou, an influential developer on the island with a fetish for jewels. Alibis unravel and motives are revealed as Rex works to uncover the culprit of this crime au naturel.