Frédéric Lemoyne must be very happy in his life: he is a famous biologist and the son of a hero of French resistance: his father, Marcel Lemoyne, doctor, took care for wounded members of the Resistance and helped them to find hiding places.Every year Jeanne Lemoyne , the elder sister of Frédéric celebrates his heroism in a square of Lyon. But suddenly François discovers a strange bank account in Switzerland.