Lincoln Loud is so excited that his favorite video game, Marshmallow Martian Blasters, is finally arriving at the arcade. He's been waiting for it forever, and nothing will stop him and his best friend, Clyde, from being first in line. Nothing, that is, except a houseful of sisters who all seem to need something from their only brother. So Lincoln devises the perfect plan, and all is well -- until one of his younger sisters needs help that only he can give.