Jeff and Sumo expect no one to show at Clarence's birthday party, just like last year. When dozens of kids arrive, the boys struggle to get face time with Clarence, the popular party host.

Water balloon fights, warring factions and the risk of jail time, everything is on the line when Clarence and friends play the biggest game of capture the flag yet! Everyone wants to take home the crown, and the power to control the neighborhood's juice boxes.