After the events of Cozy and Comfy's attempted usurpation, the Mane 6 and Colt 6 are called by the map to the last place they'd expect. The Tree Of Harmony, itself. Meanwhile an ancient foe from Equestrian's ancient past returns and assembles a league of villains to take down the Mane 6 and Colt 6 once and for all. The Mane 6 and Colt 6 are tested by The Tree Of Harmony to the fullest extent and it's not what any of them expected. Meanwhile one of the league of villains goes rouge and it's up to the Royal Siblings to step in while the Mane 6 and Colt 6 are testing.All Rights Reserved