Francois Visconti gave many years for the police service. He is investigating the routine case of the disappearance of the schoolboy Dany Arnault. The commissioner begins to suspect everyone: the piquant mother, the reticent father, the school teacher Yann Bellaile, who offered his services to the police. Visconti drifts from one suspect to another, but there are no traces of the guy anywhere, and each hour the chances to find Dany alive are less and less.