The ninja successfully recover three of the four Golden Weapons, leaving only the Sword of Fire, but dangerous confrontations have to be made to keep the weapons out of Garmadon's reach.
The four Ninja are snapped out of their post-hero complacency when Lord Garmadon's young son, Lloyd, awakens the evil snake tribe; all the while, a prophecy is revealed telling of a green ninja who will defeat Lord Garmadon.
Lloyd unlocks a second tribe - The Fangpyres - to help him regain control. The Ninja are busy setting up their new HQ that Zane discovered, but are called to duty when the Fangpyres attack the village where Jay's family lives.
After the Fangpyres join forces with the Hypnobrai, Lloyd awakens Pythor - the last remaining snake of the Anacondrai tribe. Pythor steals a map from him that will show him where the remaining two snakes tribes dwell.
Lloyd moves in and tries to make nice by helping out with chores, but he just gets in the way. Pythor has awoken the Vipoids and the Constrictaurs and an all out snake war has taken over Ninjago.
Pythor declares himself to be the destined leader who will reawaken The Great Devourer - an ancient beast who can't be killed and will consume all of Ninjago.
When the four ninja follow the mysterious falcon into the woods, they stumble on a hidden work shop where Zane learns the secret about his past and in the process, he is the first ninja to unlock his true potential.
Jay and Nya have to cut their first date in Mega-Monster Amusement Park short as the Serpentine are on their way to retrieve the first or four fang blades to be used to awaken the Great Devourer.
The four ninja go undercover as a dance troupe and enter a talent contest in their quest to win "The Blade Cup" where one of the fang blades is hidden.
The ninjas are suspicious when Lord Garmadon moves in to help searching for his missing son - but realize they have to work together in their attempt to rescue Lloyd from the snakes.
The ninja and Sensei Wu try to infiltrate the Serpentines' inner sanctum and walk right into a trap, and when Lloyd's rescue mission fails, there is only one person who can help them, namely the evil Lord Garmadon.
