In Imperium, Arin mentors a group of eager young crimefighters. Sora confronts a villain from her past. Lloyd frees an Elemental Master from prison.

To bust the imprisoned dragons out of Imperium, the Ninja will need to work hard, think fast and find one big exit! Unless the Photacs get there first.

Sora hacks into the Imperium logs to find Riyu. Nya and Kai explore a mysterious passageway. Lloyd leads an epic battle against an army of Photacs.

Ninja never quit! Nya, Kai and Zane give the battle against Imperium new hope while Lloyd uncovers a mystery hidden deep below the city.

While the Ninja try to figure out a way to bypass Imperium's energy barrier, Empress Beatrix tests a deadly weapon powered by stolen Dragon Cores.

Lord Ras and his Wolf Masks arrive at the Cloud Kingdom seeking to obtain dark knowledge. The Ninja learn about the Gong of Shattering from a shopkeeper in the Crossroads. Euphrasia fights against the Wolf Clan but is defeated by Cinder, the Elemental Master of Smoke. Percival rescues Euphrasia after her injury and takes her to the Monastery of Spinjitzu. The Ninja arrive in the Cloud Kingdom and learn about the Forbidden Five and the Blood Moon. Ras uses his new powers against the Ninja. They temporarily retreat at the sight of the power of Shatterspin.

In a flashback sequence, young Ras finds himself trapped until he meets his Master. In the present, Ras orders Cinder to destroy the Cloud Kingdom. Meanwhile, the Ninja battle the Wolf Mask Warriors, and Zane, Cole, and Gandalaria must escape the mystical storehouse. Ras's actions set in motion a series of events with dire consequences.