Forced out of his elite unit, a troubled cop launches his own rogue investigation when mysterious killings claim the lives of his former colleagues.

In an industrial seaside town, strangers burst into flames for no reason. Suicides? Murders? Supernatural phenomena? To find out, Louise, a young journalist, and Gabriel, a psychiatrist, go to investigate.

The anxious and hypochondriac police captain César Wagner is transferred to Strasbourg, his hometown, where the mayor is none other than his own mother.