Sci-Twilight Sparkle has worked on a dimensional machine for a very important science project, when she wants to do a test before going to the fair, she and her friends are trapped in another world.

Star Butterfly, Marco Diaz and a guide of Queen Moon's travel to the world of Equestria Girls to stop Toffee who has escaped from Mewni

A strange force arrives at Equestria, the threat has the ability to turn the Ponies into ferocious flesh eating zombies, the Main 6 must stop them