French adaptations of the stories by Agatha Christie.

Following a city councils decision, a women's shelter will soon be closed and social workers have only three months to accommodate the residents.

Luisa lives with Mathieu, the man she loves, and Arthur, Mathieu's son by his first wife, who died in an accident. But Arthur, whom Luisa has been raising like her own, suddenly disappears from school and no one claims a kidnapping.