Zack can't handle it anymore. His brother is dead and still haunting him and his best friend is going to sail off the Edge of the Earth to find her long-lost parents and he will never see her again. He thinks that his life can't get any worse when he's sucked into the mythical Underside and he can't find his way back. Kaz's life is bitter, but he's used to it. It's always been that way. Until one day, everything turns around and he finds himself in another world. But this world isn't perfect either.