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?

Armed with the power of Spinjitsu, Sensei Wu and his four ninja--Cole, Zane, Jay, and Kai--are up to the challenge when Samukai bets Garmadon that he can defeat Wu and his ninja, with both the world and the Underworld as the winner's prize.

Discovering the secret nest of the evil Fangpyres, Cole and his ninja team learn unexpected and shocking secrets about the Serpentine.

"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?" -- p. [4] of cover.

"For a thousand years, all the animal tribes in Chima lived together in peace. They thrived on a powerful energy called CHI, guarded by the Lions and shared fairly by all. Then, everything changed when the Crocodiles attacked the Lions for control of the CHI. Now the tribes, led by Laval the Lion Prince and Cragger the Crocodile King, are locked in an epic battle for all of Chima!"--P. [4] of cover.

The Masters of Spinjitzu are stuck on a comet, having traveled through space to save the World of Ninjago from the Nindroids. As they race through the stars, it becomes apparent that they are not alone on the comet. Something has stowed away, something not of their world.

Master Wu and the Ninjago journey to Dark Island, where an imbalance between good and evil is growing, and the ninja will have to use their mastery over the elements to stop the end of the world.

The Matoran have rediscovered their original homeland, Metru Nui, and are preparing to return there for the first time in 1000 years. The six Turaga who rule the island of Mata Nui reveal that they too were once Toa, and guardians of Metru Nui but were too late to stop Makuta from plunging both the Matoran and the Great Spirit into unending sleep.

When the "Valiant" is taken over by hostile life-forms, the "Valiant" rockets through space on a collision course with the Hero Factory in Makuhero City.