As Eragon, Saphira, Blödhgarm, and the other elves set sail into the unknown, fate intervened. Transported by a spell to another world against their wills, a dark force rises from even darker pits, and enemies thought long gone begin creeping back to haunt the innocent. The fate of two worlds rest in the bond of a rider, his dragon, and, of course, a couple of colorful ponies.

Set directly after the last book of Christopher Paolini's Inheritance Cycle, Inheritance.

(Only the main characters of the story are in the cast)
Takes place right after season 4