On an adventure, brothers Wirt and Greg get lost in the Unknown, a strange forest adrift in time. As they attempt to find a way out of the unknown, they cross paths with a mysterious old woodsman and a bluebird named Beatrice.

Somewhere, lost in the clouded annals of history, lies a place that few have seen. A mysterious place called The Unknown... Two Brothers, Wirt and Greg find themselves lost in the strange woods, adrift in a time.

With the help of a shadowy Woodsmen and a foul-tempered bluebird named Beatrice, they travel through the foggy land in Hope of finding a way home.