Four youngsters Nathan, Perry, Melissa, and Michelle appear on a desolate planet, after performing an experiment. A giant tree as large as a mountain, supporting all life, including people living in medieval villages, offers them shelter from the monsters that roam the land at night.
But this planet, Arboregal, is hunted by an evil spirit, Hellferata. Suspecting Michelle for the golden-hair hero who will vanquish her, she sends her son, Dracu Mort, to kill Michelle.
Fearful Lorns want to expel the kids from their tree, where on the ground sure death awaits them. A path back home may be found in the next giant tree, but traveling there safely is the challenge they must overcome.
Will their ingenuity, cunning, and courage help them make it to the Cascade Tree and find a way home, or will Hellferata and Dracu Mort mete out their wrath before they can escape?