Far above the small town of Zion Falls, the stars fall from the sky. Deep below the sleepy city, an ancient evil awakens. Caught in the middle are four teens with hidden powers beyond their wildest dreams.

A palace of nightmares rises from the ground just outside the small town of Zion Falls. Four young heroes must prevent the dark tower from reaching the surface, or an army of pure evil will be unleashed upon the world.

Before they can escape the underground kingdom of the trolls, the young heroes are betrayed by one of their own. The teens will need aid from beyond the stars if they hope to prevail in this final battle against ancient evil.