A married father of three, lives in Créteil doing odd jobs and spends his time at the local PMU bar. One day, to please his daughter, he promises a little too quick to take the whole family on vacation to ski. The only problem: if he breaks his promise, his wife will divorce him.

Jean-Gabriel intends to spend Christmas in the mountains quietly with his family. Many unforeseen events occur, but Jean-Gabriel will do everything to overcome them...