Deston Lesperance grew up believing faeries and monsters were nothing but bedtime stories mothers told their children. However, after his mother mysteriously vanishes and he stumbles into the mystical realm of Tir na-nOg, he discovers the shocking truth that these beings are not only real, they hold the key to his future. With his new 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 obstacles they face push the limit of what two teenagers can handle: 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 Deston is not about to give up. He'd made a vow to do whatever it takes to bring his mother back-even fight the devil himself if he had to. The thing is ... when he made that pledge he had no idea how close he'd come to doing just that "