A technician dies at Hades-9, a technological marvel suspended in the ocean's darkness. The only witness: Argos, the station's artificial intelligence. As Wiremu Tāne, the detective from the Kerguelen Islands, and Ariane Vautrin, the base director, investigate, broader questions emerge: What secrets do the abyss hold? Is deep-sea mining a promise for the future... or a deadly folly? Dive into this scientific thriller where the marine darkness closes in on its secrets...