When hometown hero Sir Rex is kidnapped from his medieval village, his young squire, Chase, decides to embark on a mission to rescue him. With the help of a former thief named Audrey, Chase must brave a treetop town, a cursed garden, terrifying creatures, and, ultimately, Sir Rex's kidnapper, the mysterious Shifter. Chase soon discovers that he must rise to the occasion or risk losing, not only Sir Rex, but the world as he knows it.