Central Kansas Library System

Sensei Wu has trained Cole, Zane, Jay, and Kai to be Masters of Spinjitzu, and together they defend the world of Ninjago from the dark forces of the Underworld. But when Samukai boasts that he can defeat Sens[e]i Wu and his four young ninja, Garmadon takes him up on his bet!

Sensei Wu must teach the Ninjago warriors the ancient art of spinjitzu in order to defeat Lord Garmadon, but first the ninja Jay, whose sense of humor is strong even in battle, must learn when it is the right time to be serious.

"Cole, Zane, Jay, and Kai, the Masters of Spinjitzu, have defeated unbelievably powerful foes and all seems well on the world of Ninjago. But all that changes when the ninja are attacked by the one foe they can't possibly hope to defeat, the one who taught them everything they know--Sensei Wu himself! This is a nightmare come true when they must somehow defeat their respected teacher and friend--or do they?!"--Page 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.