Blanche and Juju are happy: they took the train on their own to come and spend the Christmas holidays with their uncle Pierre. But at the station, surprise: Tonton is not there to wait for them. Fortunately, a neighbor drops them off in front of the house. There, new surprise: nobody! Nothing but the heavy snowfall and the fire burning in the messy living room fireplace. For Blanche, there is no doubt: Tonton has been kidnapped by gangsters and it is absolutely necessary to find him.