It's summer, and Lincoln suggests a paintball game.
On the last day of summer, the Louds are bored because they running out of things to do. After checking their list again, Lincoln notes there's something unchecked: set up a paintball game. But the sisters answer him saying there's not a paintball yard. Conveniently, on TV are announcing that a new paintball yard called 'Paint U', has made its grand opening, and will offer free gear for the opening week. Hearing this, the Louds get ready to go to that paintball yard.
Once they're there, they're attended by an old man who offers them: the paintgun, 500 ammo each, shield, helmet with viewfinder, and protection suits, plus a lunch, and a health kit. All completely FREE. The Louds thank him and they wear the suits. Once inside the game yard, they sign an act that says the enterprise won't be responsible for injuries. They see a small tent that has ammo backups, paint grenades and paint bombs. All entusiasmate too much for the idea, but they almost forgot they're family, so they promise to don't attack with too much strenghth.
Five minutes pass, the Louds start to act independently, attacking themselves in the proccess, eventually all their ammo runs out. Suddenly, bang sounds are heard up a tree. Another bang sounds again, which got to hit Lana. Once they look above the tree, they notice Lily was who had shot the bullet. As she still had 300 ammo. what she does is start to fire to half world. After the game ends, the Louds go to their house to wash off the paint.