Commander Saint-Barthélémy is back on the paradise island of his childhood. And as soon as he arrives, he already has a crime to solve. Young Tina was found drowned... at the top of a coconut tree. Who wanted to harm this sunny and helpful beach attendant? On the private beach where she worked, she took advantage of the VIP clients to unexpectedly top up her income... Fortunately, Saint-Barth, who grew up in the most legendary resort on the island, has a somewhat fanciful but infallible method for solving investigations...

Vincent Guérin's body is found at the edge of a swimming pool, crushed under a 300-kilo sculpture. Who had it in for this luxury villa caretaker? To understand, Saint-Barth must infiltrate the island's prestigious tennis club. And it seems that Vincent was using the villas he was in charge of for his own personal purposes... At the Tropicana, it's time for Saint-Barth to reunite and reminisce with his old friend Auguste and Avril, his childhood sweetheart.

Margot Rimel was locked in a shark cage eight meters deep, until she died. Who could have been so cruel to this young oceanographer? By diving into the depths of the ocean, Saint-Barth discovers that her murder is linked to a pearl of inestimable value, an object of desire and the bearer of a terrible curse... On the private side, the past also comes to the surface and the revelations that Saint-Barth will have to face will be breathtaking...