A phenomenon known as the Merge has caused many legendary realms to suddenly combine into one, but their union is unstable. A Spinjitzu Ninja Master must train a new generation of heroes to help find Elemental Dragons who can save the planet before the forces of evil use the same dragon energy to destroy this new world.

Wolf-masked warriors. Forbidden fighters. A Blood Moon. Lloyd's dreams may be visions of a startling future — unless the Ninja can rise up and stop it.

The Forbidden Five go on a hunt to obtain the Prismatic Blades in order to awaken a legendary chaos dragon known as Thunderfang. Can the Ninja stop them before it is too late?

With the Ninja scattered and their powers weakened, a hidden enemy unleashes Elemental Monsters on the Merged Lands.