Vaati comes back with a new evil scheme, the only way to start it is by tricking Link to withdraw the Four Swords from its slumber. Green, Red, Blue, and Vio return to seal the monster once more, only to encounter one of the steps of Vaati's plan...Opening portals to another universe. That universe being the kingdom of Hytopia, home to many heroes. Three of which are Olive, Ruby, and Cyan, and they get caught up in one of the portals. After falling through, it closes, leaving them stranded and having to find a way back home.