As a prophecy of the green ninja will decide who will defeat Lord Garmadon, the Ninjas hold a tournament to find out who is destined to be him, meanwhile they have to save Jumanakai Village from the Serpentine tribe.
As the Ninja train to defeat the Serpentine tribe, Zane finds himself in danger while wandering after a falcon.
Lloyd releases the Fangpyre Tribe after being defeated. As, the Ninjas are settling in their new HQ, the tribe attacks and they have to save the village where Jay's parents are.
As the Fangpyres team up with the Hypnobrai, Pythor, the last of the Anacondrai Tribe, steals a map from Lloyd after he is released.
Lloyd moves in with the Ninja and tries to help around. The Ninja must stop the attack on Ninjago, after Pythor releases the Vipoids and the Constrictaurs.
When Pythor finds the ancient Serpentine city of Ouroboros, he declarers himself to be the Snake King who will reawaken The Great Devourer beast which will destroy Ninjago.
Zane becomes the first ninja to unlock his full potential, when he follows the falcon with the other Ninjas into the woods.
Jay and Nya rush to stop the Serpentine from retrieving the first of the four Fang Blades needed to awaken the Great Devourer.
In a new mission to win "The Blade Cup" where one of the fang blades is hidden, the four ninjas go undercover and enter a talent contest as a dance troupe.
Lord Garmadon moves in to help looking for his missing son. Kai reaches his true potential and saves Lloyd from the Serpentine.
Lord Garmadon becomes the only one who can help save the Ninja, when Lloyd's rescue mission is unsuccessful.
The Ninjas race against time when they try to stop Pythor from awaking the Great Devourer after stealing the blades again.
Against all odds, the Ninja try to defeat the all consuming Great Devourer before it's too late.