A young reader was laid down to sleep. "Shh, go to sleep baby," you heard a faint voice from around you. Opening your little eyes, you stared tiredly at the man above you before nuzzling into him and curling up to him, right near his heart. He held you carefully, as if a touch any harsher than a feather would send you into tears. "You'll be the answer to everything - you'll lead the future of our world. A brighter future for our world."

Girls can't be Ninja. . . . . Can they? Lloyd is an only child. . . . . Isn't he? How did this mysterious girl get a fifth Techno-Blade and why does she look almost exactly like Lloyd? Where'd this girl even come from? - The highly experienced Ninja find themselves asking these questions, and a whole lot of others, as they uncover family secrets, new loves, old rivalries and new mysteries on the way to destroying the OverLord once and for all. Will they succeed on their own? Will they need help from their enemies? Or will the world of NinjaGo as we know it be lost?