With his new found friend, Margaux, and Excalibur’s twin brother sword at his side, Deston races against time to find his mother and the Light Crystal before the full moon rises on the autumnal equinox. The odds are stacked against him and the mind-boggling obstacles he comes across pushes the limit of what a teenager from Pennsylvania is capable of handling: an attack by gremlin-like creatures; captured by 6 foot tall vampire bats; hunted by a giant wolf, and almost lost forever in the mist of Avalon, but even still Deston doesn't give up. He can't, for he made a vow to do whatever it takes to get his mother back, even if that means fighting the devil himself to do so. The thing is … when he made that pledge he had no idea how close he'd have to come of doing just that!