When snow closes Greg Heffley's middle school, he and his best friend, Rowley Jefferson, face a fight for survival as warring gangs turn the neighborhood into a wintry battlefield.Rival groups fight over territory, build massive snow forts and stage epic snowball fights. And 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 Greg and Rowley emerge as heroes? Or will they even survive to see another day?