Lego Nexo Knights is an animated television series, based on the Lego theme of the same name.In a medieval yet futuristic world, Clay, Aaron, Lance, Princess Macy, and Axl are five young knights who protect the kingdom of Knighton from Jestro, the Book of Monsters, and their army of Lava Monsters. They also help the Knighton Royal Family, the digital wizard Merlok 2.0, Robin Underwood, and Ava Prentiss.