During their winter vacation, children in a quaint village opt for an epic snowball battle to keep themselves entertained. Eleven-year-olds Luke and Sophie emerge as the captains of the rival teams. Sophie and her group protect a meticulously crafted snow fort from Luke’s attacking forces. The team that controls the fort by the end of the break is declared the winner. However, what begins as innocent fun and excitement gradually escalates into a more intense rivalry. Harmony is eventually restored when the kids unite to target the fort itself, joyfully demolishing it together.