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.

Saint-Barth is reeling from recent revelations about his past when he is called to a new crime scene. Célia Gomez, a young nurse, was found dead in her convertible, a syringe stuck in her heart… The Saint-Barteam discovers that she was sleeping in the back room of a nightclub and that she was using her nursing skills for not very legal purposes. To shed light on this new mystery, Saint-Barth will have to investigate the world of partying. A journey to the end of the night from which he will not emerge unscathed… Fortunately, his old friend Auguste is there!