Taking inspiration from the comic books of the same name, each episode explores a pivotal moment from the Marvel Cinematic Universe and turns it on its head, leading the audience into uncharted territory.

In a time when the great war between five rival races for supremacy on Earth ended with humanity’s victory led by the hero Sid, the world suddenly gets “overwritten” right before the eyes of a boy named Kai. In this rewritten world, Kai witnesses humanity’s defeat in the war as a result of Sid’s absence—where dragons and demons now rule the land, and Kai himself has become a forgotten existence to all humans. However, after encountering the mysterious girl Rinne, Kai resolves to break free from this rewritten fate. In a world without a hero, he inherits the sword and martial skills of the hero (Sid) and challenges the powerful enemy races that dominate the land.

Will Serfort dreams of keeping his promise to a childhood friend by becoming a Magia Vander, one of the mighty magicians who sit atop the Wizard’s Tower. However, he is unable to cast even the simplest of spells, leaving him to fight dungeon monsters to earn credits at Regarden Magical Academy. As if that weren’t enough, he finds himself putting his sword skills to the test against a bullying professor!

Following the events of Trollhunters and 3Below, Hisirdoux ” Douxie” Casperan – who has secretly been the apprentice of Merlin for nine centuries – must recruit the Guardians of Arcadia to travel back in time to the 12th-century’s Camelot. During the journey, the heroes learn why the amulet was built, how Morgana became the Pale Lady, and what events lead up to the Battle of Killahead Bridge.