The year 1963, the Algerian War has just ended. The legendary Sam Spade is enjoying his retirement in the south of France. Unlike his days as a private investigator in San Francisco, Spade's life in Bozouls is peaceful and quiet. But the possible return of his old opponent will change everything. Six beloved nuns are brutally murdered in the local convent. As the city mourns, secrets are revealed and new clues are uncovered. Spade learns that the murders are somehow connected to a mysterious child believed to have great powers.