Sequel to The Loud House Movie.

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.

Join the Loud family as they embark on a hilarious and exciting journey filled with fun, friendship, and unexpected twists. When the family goes on a vacation to Scotland, they stumble upon a hidden castle and discover their royal heritage. With the help of their new Scottish friends, the Louds must navigate the challenges of being royalty while staying true to themselves.