Sensei Wu must teach the Ninjago warriors the ancient art of spinjitzu in order to defeat Lord Garmadon, but first the ninja Zane, who has no memories of his past, undertakes a quest to recover them.

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?

When one of his publicity stunts to help his friends take advantage of having defeated the Preeminent goes wrong, Dareth, the Brown Ninja, finds himself in trouble and surrounded by angry warriors.