While the Louds are relaxing on the island, a danger awaits to kidnap someone.
After designing the blueprints of the ship they will use to go back to the US, all of the Loud siblings are tired, and they want some break time. All agree, but Frank warns them to not go too far in the forest, or else a creature would kidnap them and take them to its hideout.
Ignoring the warning, the Louds explore the island, finding a small civilization where the tribe lives. In a brick house, that really is an underground bunker (the island has been in conflict since 1893 between New Zealand and Chile for control over the island). And because bombs constantly fall on the island, outside is not safe.
The tribe accepts to keep the Louds until the ban is over.
When night -when no bombs fall from the sky- Lincoln decides to explore beyond. He goes to the forest, when strange things appear (The other night a mutant hand appeared and took all pineapples in the island). He is attacked by a panther. Lincoln could escape. He entered inside a cave, where the same panther appeared. The panther is revealed to be Gluan in a disguise (Lincoln knew that when he punched the disguise). Both go home while Gluan is covering her injury from a failed prank.