The series revolves around the Kingdom of Knighton, where there are five young knights: Jestro, Clay, Macy, Axl, Lance, Aaron, and Claybot. On this trip ?, each of them started facing a strange path by fighting Jestro, his friend, the Book of Monsters, and their monster army under the guidance of the Knights Academy Advisor and the great digital processor Merlok 2.0.