Season seven follows the Hands of Time as they retrieve four time blades scattered across Ninjago and involves the main ninja characters Kai and Nya following the Time Twins back through time.
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.
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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.