Teenagers with superpowers can join one of two opposing teams: the Thunderheroes or the Forces. Both teams try to enlist 16-year-old Dawn, who they say has the power of the tornado. Meanwhile the leader of the Forces, 17-year-old Dekay, has been overthrown by a nightmare. The abyss of darkness has been opened and is hungry for anyone to enter in. Only the Three Mighty Ones can combat it. But when two of them abandon the Thunderheroes and only Dawn is left, how in the world will the void of darkness be defeated?