He sinks… Little by little. Eloïse. His obsession. Eloïse… Everywhere. All the time. Eloïse. His disturbed mind slips into the limbo. He starts following her. Eloïse. No one else. The one. The only.

Paris, December. A conductor of a choir is found mysteriously murdered, with burst eardrums. Lionel Kasdan, a police inspertor the verge of retirement, and Frank Salek, an official of Interpol, embark together on a hunt for the killer, and also to a secret organization specializing in kidnapping children.

Nathan, 25 years old, is an idealist. He has a meeting with Daniel, his producer. His heart is pounding. There's something Daniel needs to tell him.