A Paris suburb. Early morning. A police operation goes wrong and Captain Noémie Chastain is shot in the head. She will survive, disfigured, a living reminder for her colleagues of the dangerous nature of their job.
Months later in Avalone, rural France, the tiniest and quietest precinct in the country, where Noémie has been sent to recover in spite of herself.
Her secret mission: write a report to support the closure of the local police station.
One morning, a keg is found floating in the lake near the village. Inside it, the body of a child that went missing 25 years ago...