When the Ninjas' attempt to return Garmadon's 'Helmet of Darkness' to its perch at the Celestial Clock in order to prevent the final battle between Lloyd and his father from beginning fails, a Super Weapon is created that can destroy all of Ninjago. When Garmadon travels back in time in order to undo the past and rid the Ninja from the future, the Ninja follow him and try to stop him by using the Golden Weapons from the past to clash against Garmadon's Mega-Weapon. Just as the rebuilding effort in Ninjago begins, the four ninjas come to realize that evil has started to resurface with Lord Garmadon forging the ninjas' lost Golden Weapons into a Mega-Weapon with unspeakable powers. The ninja try to flee from the rest of the Stone Army that has been brought to life by the Devourer's toxic venom - and things get a lot worse when Garmadon arrives with a 'Helmet of Darkness' and seizes control of the Stone Army. After battling off Garmadon's Stone Army, the Ninjas finally arrive at the Temple of Light where they harness their pure elemental powers, concentrating them onto Lloyd who becomes more powerful than he ever imagined.
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