Nine days after a incident, a group of four students encountered a Deplacer, a mysterious entity and tried to take on him. They paid the price of that error by being thrown into Equestria and turned into the villains... But not the equestrian ones.
Sandbar, Ocellus, and Silverstream are acting weird after dipping into some red slime. The thing is, they're not the same ones Gallus, Smolder, or Yona know.