Marsac is a quiet town in the Pyrenees, best known for its elite university. But when one of the professors is found drowned in her bath, it becomes clear that the tranquil surface is a lie. The chief suspect is the son of Commandant Servaz's university sweetheart; and when she implores him to investigate, he cannot refuse. To close the case, Servaz must delve into his own past and re-open old wounds. It will be his most dangerous - and his most personal - investigation yet.