As the 8th Mayan Prophecy unfolds, Nick Jensen and his best friends, Grace Walker and AJ Janikowski, are asked to find a potion to control Nick's twin brother Terry's bipolar disorder. But when they succeed, will it come with a price?Alerted to their accomplishment, Tristan Warrington, the Tepal, coerces them to take on a second, much more dangerous mission - one that has led to dire consequences over thousands of years to anyone who has sought what...