Michel Lesay

Young conductor Roberto Lombardini has never known his father who is actually a former musician, a failed piano player who has sunk into alcoholism.

When Monsieur Crauqual, the supervisor, is found hanging, all wonder why this rather rich person decided to kill himself. And when a pupil is found hanging too, François and his friends decide to investigate. They are certain there is a killer within the walls of Collège François 1er and determined to prevent him from going on running wild.