Master Wu engages in a fight left unfinished decades ago against Acronix, one of the twin Hands of Time. The ninjas try to rescue him.

The Ninja learn more about Krux and Acronix, two fallen Elemental Masters, and discover a new enemy, the Vermillion Warriors.

Kai's investigation of a Vermillion Warrior helmet leads him to discover that Krux is alive, and living under an assumed identity.

While the Vermillion Warriors are responsible for a metal theft spree, Lloyd learns that taking over for Master Wu is not an easy task.

The Ninja try to save MegaMonster Amusement Park; Jay defends his family's home against Vermillion Warriors.

The team celebrates their escape from the Vermillion Army, but Acronix and Krux are determined to get their Blade back.

Nya confronts the Samurai X imposter; Kai pursues the truth about his parents; the others try to locate and rescue Master Wu.

Kai confronts his father for aiding the Hands of Time; the team works to free Wu, Cyrus Borg and the other captives.

Kai and Nya are blackmailed into using their elemental powers to retrieve the final Time Blade from the Boiling Sea.

Kai and Nya stow away with the Hands of Time to save Master Wu, and must help the Elemental Masters prevent Krux and Acronix from re-writing NinjaGo history.