Le mystère de l'espadon pâlichon

Tom Mirel's body is found on a beach, impaled by a swordfish! Problem: the fish died before the surfer... So it's murder. When he gets back on the victim's board, Saint-Barth understands that Tom was fighting with his team for eco-responsible surfing. But was this noble cause really unanimous among the small group of teenagers with distant family backgrounds? Saint-Barth is finding it increasingly difficult to hide from Lou that he is her father. But he promised Avril not to say anything...