Created by Patrick McHale (Adventure Time), the 10-episode tale follows two brothers, Wirt and Greg (voiced by Elijah Wood and Collin Dean), who mysteriously find themselves outside of the world they know and in a forest called the Unknown. In a Wizard of Oz-like twist, they have stumbled into a fantasy universe of the past filled with the things of folk tales, as well as talking and singing animals, all wrapped up in the seemingly constant backdrop of harvest time.