Lloyd discovers that there are a group of bandits that follow Lord Garmadon even though Garmadon is dead
After a vicious attack in the palace, Lloyd and Jay are trying to find more information about the Oni Masks, while Zane and Cole are trying to go undercover and enter the S.O.G.
Zane, undercover as "Snake Jaguar", is brought into the Sons of Garmadon's hideout in the subway, where he meets Killow, the "Big Man", who is responsible with accepting new members and who challenges Zane to a bike race.
After a battle with Mr. E, Zane is severely injured and left in the desert until the ninja find him. While looking after the baby Cole found, they discover his blanket is a map to the Primeval's Eye, where the Oni Mask might be located.
While Lloyd and Harumi venture deep into Primeval's Eye, the other Ninja attempt to fix the Bounty and discover that the baby is Wu, who is recovering from the power of the Reversal Time-Blade.
Lloyd and Harumi enter the Oni Temple and, after passing by some paintings depicting the Oni and traps, the two eventually find the Oni Mask.
The Ninja return to Ninjago and arrive at the Police Station to ask for help in stopping the Sons of Garmadon's plan.
Lord Garmadon returns to Ninjago and releases all the imprisoned Sons of Garmadon and Harumi encourages him to "achieve his true potential" by conquering his son.
The Ninja find Lloyd and manage to save him, at the cost of his elemental powers. Garmadon arrives in Ninjago City and four of the ninja receive a package from Mistaké and leave to fight a stone giant Garmadon built, Colossus.
Master Wu mistakenly tries to single-handedly complete a battle he began decades ago against Acronix, one of the twin Hands of Time.
The Ninja learn more about the Krux and Acronix - the two fallen Elemental Masters known as the Hands of Time - and are sure that this threat has finally been eliminated.
Kai's investigation of a Vermillion Warrior Helmet leads him to discover that Krux is alive and well in Ninjago, living under an assumed identity.
In the midst of an epidemic of mysterious metal thefts by the Vermillion Warriors, Lloyd realizes that stepping up and taking over for the ailing Master Wu is not an easy task.
While the Ninja fight to save MegaMonster Amusement Park, Jay struggles to defend his family's home from the Vermillion Warriors.
The Ninja celebrate their escape from the Vermillion Army and their retrieval of the Emerald Time Blade, but with Acronix and Krux determined to get their Blade back, the Airjitzu Temple becomes a battleground.
Secrets are revealed as Nya confronts the Samurai X imposter, Kai pursues the truth about his parents and the other Ninja desperately seek to locate and rescue Master Wu. But as usual, some answers only lead to more questions.
Kai confronts his dad for aiding the Hands of Time, only to discover that his parents are actually Acronix and Krux's captives.
The Hands of Time blackmail Kai and Nya into using their combined Elemental powers to retrieve the fourth and final Time Blade from the Boiling Sea with the promise that the siblings can use its reversal power to save the quickly-fading Master Wu.
Kai and Nya stow away aboard Krux and Acronix's time travelling snake mech in a desperate attempt to save Master Wu. But when they arrive in the past, they must help the Elemental Masters prevent the Hands of Time from literally re-writing Ninjago history.
Lloyd hides from the occupying forces of Emperor Garmadon and Harumi, while Young Wu and the ninjas are marooned in the Realm of Oni and Dragon.
Iron Baron banishes Jay, Kai and Zane to doom in an arena against a dragon. In Ninjago, Lloyd assembles a rebel group of Elemental Fighters.
The ninjas are caged and used as bait to lure a dragon. Lloyd and his resistance fighters hijack a TV station to broadcast a message of hope.
The enslaved ninjas gather materials so that Cole and Wu can build a dragon decoy. The Sons of Garmadon strike back at Lloyd's rebels.
Lloyd and some of the resistance fighters are on the brink of capture in Nya's vehicle. In the Realm of Oni and Dragon, the ninjas and Wu go on the run.
Mystake reveals her true nature and past, while Wu leads the search for Firstbourne.
Wu's identity is revealed while Lloyd and his comrades come up with a new plan involving Harumi.
When Wu is captured and electro-shocked, his memories suddenly return. Lloyd uses stolen powers to try and seize the Oni Titan.
An angry Garmadon looks to regain control while Wu and Iron Baron land in Firstbourne's nest.
The ninjas return to Ninjago and head to battle just as a terrible attack is underway while Master Wu and Lloyd confront Lord Garmadon.