When a mysterious army of living skeletons kidnaps her brother Hitch Trailbrazer, Sunny Starscout vows to rescue him... but she can't do it alone.

Now, with the teachings of Sensei Twilight Sparkle, she, along with three other girls, will have a mission: become ninjas, recover the Four Weapons of Spinjitzu and save Hitch and the world.

Will they get it? Or the evil Opaline Arcana used the power of the Weapons to conquer the world?

Only one thing is clear: it's time for NINJAAAAA-GO!!

Inspired by the pilot prologue of "Ninjago: Masters of Spinjitzu"