Peter Walsh and Evie O'Malley are two children unaware of their magical abilities until they stumble across a portal that leads them to Eden. Suddenly they are guardians in training, preparing to destroy the evil witch holding their parents hostage and save Eden and Earth from destruction. On their journey, they are joined by Fable-a charismatic frog with a penchant for folk songs and storytelling, the stoic Horses of the Hill, and Eammon the Great, Master Hunter. Peter and Evie find themselves on a once-in-a-lifetime adventure, discovering secrets to a past they never knew and the possibility of a future they never dreamed of.