It has been two weeks since the defeat of the Dark Lord, but already there is a new threat to Miitopia: The Shadow Queen Kojima, who seeks to awaken The Eternal, about which Janice is not told anything. On top of that, Kojima strikes Janice's heart with a sword of darkness, causing her to see odd visions. What do those visions mean? Can they defeat Kojima? Where is the guardian spirit? And what does all of this have to do with Janice?

Cousins Jake and Seth travel to the famed land of Miitopia for a nice vacation, but not all is right in the kingdom of Greenhorne. Kasey, the Dark Lord, is running amok, causing trouble and stealing innocent people's faces to give to his growing monster army! They will deepen their bond together while making new friends, forging lasting relationships while slaying the Dark Lord's monsters. Will they stop this terrible fiend, or fall victim to one of his vile minions?

All was peaceful in the Miiverse, but when trouble strikes, three friends must unite to save their world. Can the Mii Fighters stop the threat? Read to find out!