When last we heard, the Guardians were resting easy with the knowledge that the children of Santoff Clausen were finally safe from Pitch's dastardly plans.

But is it all a ruse, a scheme, a lull the evil Nightmare King has deviously concocted?

Whatever Pitch's plans, what he doesn't know is that there's a new Guardian in town, and she's not the type to forget old grudges....