The Book of Monsters, having the final pieces of his evil plan in place, tries to take human form. Can the NEXO KNIGHTS and Merlok 2.0 stop the greatest threat they’ve ever faced? Or will the kingdom be plunged into darkness…forever.

Clay takes a walk in the forest. Monsters follow him. He thinks back to when he was young and started dreaming of becoming a knight and did his first heroic act. The monsters attack him, but he thwarts their attack and defeats them easily. Macy and Aaron are mad he got in a fight without them.

In a massive chase around Knighton, the NEXO KNIGHTS attempt to keep the Book of Betrayal out of the Book of Monster’s grip. But the evil book is persistent. Will he get the final piece of his evil puzzle?

Rival to the King, Jorah Tightwad thinks his knights – the Tighty Knighties – are easily better than the NEXO KNIGHTS, so he challenges King Halbert to prove who’s better during the King’s Birthday Tournament.

Power up with The Axe of Merlok and defeat your foes! When Macy is surrounded on all sides by bad guys, she summons the awesome power of the The Axe of Merlok! Watch as 5 spinning axes fall from the sky – 3 from the left, and 2 from the right, and each axe deals area-of-effect damage upon landing. Take a ‘byte’ out of the evil tech infectious bad guys and team up with the NEXO KNIGHTS™ team!

The Knights are tasked with protecting the King’s valuable Ned Knights comic book during the Bookingheim Knight-a-Con. But with all the costumed kids there, will they recognize the real Jestro and Book of Monsters coming to get them?

The Book of Betrayal leads Jestro and his Monsters to Funnyton – the funnies town in the kingdom. When the Knights arrive to capture him, they discover (to their shock) that Jestro and the Book of Monsters are now the town’s top comedians!

Robin wants to join the NEXO KNIGHTS heroes in battle, but he is too small. Robin starts developing extra legs to make him taller and ends up developing the powerful Ultra Armor. The knights use the ultra armor to defeat the monsters even more easily than before. All cheer Robin's great idea.