Since the death of his wife, Christophe is a control freak. When a supervisor is declared absent for the snow holiday camp right before Christmas, Christophe volunteers, but his son Victor and Marina the biology teacher are not too enthusiastic about it. Christophe feels confident until he is gifted with a mysterious power: he can hear the teenagers' every thoughts.

Bois d'Enghien, engaged to a young girl from a good family, has to break up with Lucette Gautier, his mistress, a dilettante of salons. Not having been able to tell her of his break-up, he finds her at her fiancée's house, invited for the event. A Mexican general, jealous of his rivals, arrives and complicates the situation, as does a notary clerk, Bouzin, a singer in his spare time.