Young and ambitious Captain Vivés has just been appointed group leader at the Grenoble Criminal Squad when Clara's murder case lands on his desk. Vivés and his team investigate Clara's complex life and relations, but what starts as a professional and methodical immersion into the victim's life soon turns into a haunting obsession.

Paris, at war. 2026. Night after night, Lucia, a young nurse, cares for the wounded and the dying. One evening, she sees a strange man walking on the water of the Seine river. At that moment, a hope and a troubling desire take hold of her.