Jay, a member of Sensei Wu's team of ninja warriors is an inventor at heart and has an unfailing sense of humor--even in the toughest battles. But if he keeps laughing at danger, will the joke backfire on him?

The heroes receive dire news: prior to their original capture, Core Hunter, Voltix, XT4, and Thornaxx stole four components of what is said to be a devastating super-weapon called "The Doom Box." This device grows larger on activation, encompassing anything in its path, then collapses in on itself--a serious danger enough--but the box is capable of growing to the size of an entire galaxy! Now that the villains have escaped, they are believed to be...

Zane, who is a member of Sensei Wu's team of ninja warriors, has no memories He wants to find answers about his past, but getting them might put the whole team in danger, and, indeed, when fellow ninja Kai attempts to help Zane, he finds himself in trouble.

Sensei Wu wants Zane to become a Master of Ice -- but he's already a master of snow. There's no mountain anywhere that's a match for his snowboard. But he'll need more than his passion for sports to master Spinjitzu.

Cole, a member of Sensei Wu's team of ninja warriors, must keep his fellow ninjas' egos in check as he strives to unite the warriors and lead them on their dangerous missions.

Kai and the other ninja have a mystery to solve when Master Wu turns upin Kai's village, injured and acting very strangely.

"Jay, cole, Zane, Kai, and Sensei Wu are strangers in an even stranger land-- Garmadon City! But the name is not what's strange! The fact that everything is made of stone-- the streets, the buildings, the trees, even the people!-- that's the really strange part. But how do you save people who have been turned into stone who don't want to be saved, and will do anything to stop you?" -- Page [4] of cover.