Charlie has no idea why he and his friends were brought back in time or who brought them there. But one thing is certain: somebody dangerous and powerful is after him—and he wants him alive. 

Seventeen-year-old Charlie Henderson has lived a sheltered, rather uneventful life in Fresno, California—but he’s always wanted more. As his senior year of high school approaches, he vows to finally break out of his shell, leave his nerdy reputation behind, and become popular like his younger sister, Maddie. At first, everything seems to be going well for him—until one night when he, Maddie and three of their friends are mysteriously transported back in time. With nothing but the clothes on their backs, the five teens must navigate this new place and time…a world filled with more chaos and danger than they have ever imagined.