Sir Morien sets off from Africa in search of his father, and meets Sir Gawain and Sir Lancelot who invite him to join their quest.

Twelve-year-old Max, who loves the legend Buelo tells him about a mythical gatekeeper who can guide brave travelers on a journey into tomorrow, sets out on a dangerous quest to discover if he is true of heart and what the future holds, armed with a treasured compass, a mysterious stone rubbing, and Buelo's legend as his only guides.

"The thrilling conclusion to the epic middle grade fantasy trilogy from Katherine Applegate. In the beginning, Byx's original quest was to discover if there were more of her kind, or if she was destined to become an endling--the last dairne alive. She did indeed find more dairnes, and along the way she also created allies among other creatures in her world, including humans, felivets, raptidons, and wobbyks. But Byx and her new friends soon learned...