After the ceremony in their honor, The mane 8 (Sunrise included) are officially the heroes of Canterlot...between their classes and their work of superheroes, They decide to take a break.. but a powerful threat from another universe, The evil and terrifying Mane-iac, came into their world and attack the town.. and not only her, but some of the most powerful villain of Maretropolis and even another Mane-iac from the pony world join them. the heroes learn than the Power Ponies have been defeated in their both worlds(pony and human). The Mane 8 will have to stop them before they destroy the town and go to Equestria...