The Louds are getting ready for Christmas, when the unthinkable happens to Lincoln; his sled goes in their neighbor's yard! Lincoln and Clyde attempt to pull off a sled rescue mission, and end up finding secrets about Mr. Grouse.
Hoping to win a song-writing contest, Luna contemplates whether she should go with a song that's true to her sound or try to make something that the whole world will love.
For Halloween, Lincoln and Clyde have scoped out a fancy neighborhood to make their dreams of scoring full-size candy bars a reality. Meanwhile, Lucy puts on a haunted maze, and the younger girls scheme to get maximum candy.
After seeing a scary movie (that his parents told him not to), Lincoln can't go to sleep and pulls an all-nighter. When a common cold ravages through the loud house, Lincoln believes his sisters have turned into Zombies!
The Loud parents take their kids to a spa resort, but they end up causing trouble there. When Lucy develops a crush on a normal boy, her sisters help give her a makeover to win him over.
The kids promise to help Dad with the grand opening of his new restaurant by coming up with promotions. But their lack of teamwork and crazy promos lead to an ultimate nightmare in the kitchen for Dad.
When the kids hear Lily curse, they're worried they have been a bad influence on her. A love letter addressed to "L" Loud shows up at the house and the family has to figure out who it was meant for.
Lincoln will be going to his first ever rock concert and Luna wants it to be his best experience ever in his life; Lincoln finds a letter to in the attic.