The investigation into Océane's disappearance intensifies under the leadership of Captain Chloé Rousseau. The first clues seem to point toward Hugo Bennec, whose past and connection to the missing teenager raise troubling questions. As the police struggle to gather solid evidence, both media and institutional pressure mount around Morgane. Convinced that key pieces of the puzzle are being overlooked, she decides to conduct her own investigation, a choice that gradually leads her into increasingly dangerous territory with unpredictable consequences.