The action occurs at the futuristic Kingdom of Knighton. It centers upon the Nexo Knights since they journey to conquer their monster army, the Book of Cards, and also Jestro the wicked jester. The Nexo Knights, which include Axl, and Macy, Lance, Aaron are led by clay. Together, under their mentor Merlok 2.0they group together to conquer Jestro.