In the heat of a French summer, Captain Paul Darac of the Nice Brigade Criminelle is called to a highly sensitive crime scene.

A man has been murdered in the midst of a prayer group, but no one saw how it was done. And the more Darac and his team learn about the victim, the longer their list of suspects grows. Darac's hunt for the murderer will uncover vengeance years in the making, and put the life of one of his own at risk...