Lincoln Loud gears up for the ultimate Christmas, until he finds out that most of his sisters have plans to be elsewhere for the big day. Determined to remind his family that they all need to be together, Lincoln and his best friend Clyde McBride embark on a mission to preserve the family’s holiday traditions.

Courtney Whitmore, a smart, athletic and above all else kind girl, discovers her step-father has a secret: he used to be the sidekick to a superhero. "Borrowing" the long-lost hero’s cosmic staff, she becomes the unlikely inspiration for an entirely new generation of superheroes.