There's always something going on in the Wynnter Household no matter the time of day. Kei and Brie Wynnter are twin sisters who are outstanding students and daughters around the clock. They love to learn and help their friends, so when their super smartwatches chirp, they become The Mighty Majesty Heroes. This adventure on ABC Island is a quest for one of the letters gone M.I.A. The Mighty Majesty Heroes travel high and low over the island and solve the mystery. There's nothing they can't do to help out their friends around the world when they call? Mighty Majesty Heroes to the rescue!!