When Father Martin Grün-a respected priest in the university town of Marburg-disappears, the police shrug it off. For Sister Agatha, a nun with a past as complicated as it is compelling, that silence is its own alarm. Refusing the local authority's easy answers, she turns to Jean-Luc Sauvage, once her first love and now a Belgian detective.Their unofficial search pulls them into a community threaded with tension, buried loyalties, and secrets some will do anything to keep. As manipulation curdles into violence and powerful interests close ranks, the pair must face not only the enemies in the shadows but the fractures in themselves.How far will someone go to protect a secret-and at what price?A taut psychological thriller where certainties crumble and every revelation feels like a threat.