In the peaceful alpine village of Granges-de-Mortes, a tragedy has just taken place: Gustave Boeuf, the local Casanova, has mysteriously died at the foot of a wayside cross. Shortly afterwards, a peasant, who is suspected of having murdered him, hangs himself from a branch of the calvary. But was he the real culprit? Angélique Barrodet, an old maid , who had been Gustave's fiancée before he abandoned her on the very day of their wedding, leads the investigation in her own way.