The kingdom is threatened by an army of Lava Monsters, and the inexperienced NEXO Knights must come to the rescue.

The Cloud of Monstrox and Jestro unlock a mysterious forbidden power; Merlok 2.0 and the NEXO KNIGHTS try to make the new COMBO NEXO Powers work.

Jestro and the Cloud of Monstrox encounter the sculptor who helps unleash a horde of fierce garden gnomes on Knighton.