"It is shortly after the Day of the Departed and all has returned to normal in NINJAGO. While the Ninja are back at the museum cleaning up the mess they made, Master Wu waits alone at his old Monastery. Soon, there is a flash of LIGHT and an old enemy mysteriously appears. Wu and the stranger engage in an epic battle which we soon learn is actually the finale of a fight that began forty years ago between the Elemental Masters and the Hands of Time. Who are the Hands of Time? KRUX and ACRONIX, two fallen Elemental Masters who could once control time itself before Wu and Garmadon barely managed to strip them of their time-shifting powers and transfer them into four TIME BLADES! Wu and Garmadon sent the Blades into a temporal vortex and Krux and Acronix followed, leading our heroes to think the threat was over."