Desperate to get off Santa's Naughty List before Christmas, Lincoln resorts to hacking into the North Pole computers and putting himself on the nice list. But when the hack gets out of control, he ends up reversing the Naughty/Nice lists around the world and turning the North Pole itself Naughty. Lincoln enlists his family to go to the North Pole and try to fix the mess he made. Teaming up with his new frenemy, Duncan, the elf who first put him on the naughty list, Lincoln and the Louds must battle a now evil Santa and his minions to save Christmas.

A Chicago sports radio shock jock is changed by a Christmas season encounter with a 15-year-old fan who is dying of cancer who forces him to be nice for a day.

The Loud family travel to Scotland and discover they are descendants of Scottish royalty as they move into their giant ancestral castle.

A cynical radio host is banished to Colorado, where he has an on-air spat with a hopeless romantic. Soon, their antagonistic relationship sparks the interest of the whole town.

Lincoln and the Louds are ecstatic to welcome their new Gran-Gran, Myrtle, into the family with a tropical wedding celebration; but the festivities are cut short when an old nemesis from Myrtle's secret agent past appears on the island.

Eve is a Christmas movie fanatic and dreams of having a movie-perfect Christmas with a movie-perfect boyfriend. On Christmas Eve, when Eve and her cynical sister Lacy make wishes to Santa, they wake up in Christmas Town and find themselves trapped inside a Christmas movie where they are the stars. But when things start to go wrong, and Eve's knowledge of all things Christmas movie fails to fix things, Eve and Lacy try to find a way out of the picture-perfect Christmas and back to reality.

Eve is a Christmas movie fanatic and dreams of having a movie-perfect Christmas with a movie-perfect boyfriend. On Christmas Eve, when Eve and her cynical sister Lacy make wishes to Santa, they wake up in Christmas Town and find themselves trapped inside a Christmas movie where they are the stars. But when things start to go wrong, and Eve's knowledge of all things Christmas movie fails to fix things, Eve and Lacy try to find a way out of the picture-perfect Christmas and back to reality.

Lincoln Loud goes through various obstacles caused by his 10 sisters in order to get to the bathroom.

Lincoln and his friends officially start going to middle school, but problems arise when Lincoln learns that he's stuck in a different class from his friends. And when he tries to get transferred to his friends' classroom, he instead ends up being moved to a different school in Canada! Meanwhile, Lori has trouble fitting in at college, and Lynn Sr. and Rita try to get Lily to finish potty training.

12-year-old Lincoln Loud goes on new adventures in the town of Royal Woods with his best friend Clyde McBride, while also navigating the chaos of living in a family with 10 sisters.