Wintertime in Lyon. About a dozen people, men and women, are having a snowball fight in the middle of a tree-lined street. The cyclist coming along the road becomes the target of opportunity. He falls off his bicycle. He's not hurt, but he rides back the way he came, as the fight continues.

A spectacular sled race through the village. Frankie-Four-Eyes and his team, including Sophie as the driver, take on the newcomers: the mysterious and conceited Zac and his athletic cousin Charlie.

To amuse themselves during the winter school break, the kids in a small village decide to have a massive snowball fight. Luke and Sophie, both 11 years old, become the leaders of the opposing sides. Sophie and her cohort defend an elaborate snow fort against the assault of Luke’s horde. Whichever side occupies the fort at the end of the winter break, wins. But what starts out as pure youthful fun and enthusiasm deteriorates into a more serious conflict. Joy is restored when all the children decide to attack the fort rather than each other and happily destroy every last bit of the snow fort.