When snow shuts down middle school, rival groups fight over territory, build massive snow forts, and stage epic snowball fights. Right in the crosshairs are Greg and his trusty best friend, Rowley Jefferson.

It’s a fight for survival, as Greg and Rowley navigate alliances, betrayals, and warring gangs in a neighborhood meltdown. When the snow clears, will they emerge as heroes? Or will they even survive to see another day?