During the winter school break, Sophie and Luke are eleven years old who decide to lead opposing snowball teams, and the side that occupies the snow fort wins.
When a weird incident prevents Frankie from winning a sled race against the newcomer Zac, he stubbornly tries to prove that Zac cheated. As Frankie demands a rematch, Zac plots to seize the chance to win the barn that Frankie betted on the race, having no qualms about cheating again.