Morgane is 38 years old. She raises her 3 children alone. She manages (or not) her 2 exes and her various credits. Her 160 IQ scores spoil her life a bit until the day when Morgane sees her destiny as a cleaning lady turned upside down. Her extraordinary abilities are spotted by the police who offer her a job as a consultant... Problem: Morgane hates cops...

35-year-old Audrey, the only survivor of a mysterious serial killer who raged in the Biarritz region 16 years earlier, is brutally taken back to her past by a new crime: a 17-year-old girl is found murdered on the Basque coast. Nothing links this murder to the series of crimes committed in the early 2000s by the "Itsas Killer," but Audrey is certain that Itsas is back.

Elsa and Laurent, happy parents of Lucie, have lived a perfect love affair for twenty years. Until one morning, Elsa disappears without trace. Laurent's world collapses when the police inform him that Elsa was in fact a very different person from the one she pretended to be.

Beneath her eccentric appearance, Captain Marleau is a formidable detective. Her Sherlock Holmes deerstalker cap, her character, her unusual appearance, her humor, her unpredictable behavior--Captain Marleau is not your average gendarme. She never rushes an investigation; she becomes the investigation and relentlessly pursues the suspects.