The director and the colonel Bourelon have a new mission for Imogène: she must find and protect a French secret agent called Flambard who has gone to the enemy.But Flambard is ready to give in exchange of his immunity very secret documents to the French government.The meeting will take place in a cemetery,Imogène will wear the white habit and bring chrysanthemums.Flambard arrives late and is murdered by a killer.
—zutterjp48