"The evil wizard Maldred has stolen the gold and silver keys which will allow him to release the Naga, the powerful earthquake dragon at the center of the earth--so Drake and several of the other Dragon Masters travel to the Naga's Temple in the Dragon Islands, to try and stop Maldred, and prevent him and the earthquake dragon from destroying the kingdom." --

When the king decides to take the dragons to Arkwood to visit Queen Rose, Rori, Drake, and their dragons are left behind--so when the evil wizard Maldred attacks the castle riding a giant four-headed dragon that spits poison, the two young dragon masters and their dragons are forced to defend the castle by themselves.

The city of Remus is being torn apart by a duel between two wizards, and Drake, Petra, and Griffith have traveled there to assist a blind dragon master, Tessa, in sorting out the situation; using the sound dragon's unique power to manipulate sound waves,the dragon masters retrieve the Power Crystal which is embedded inside an unbreakable rock, but will it be able to absorb the cloud of uncontrolled magic that is threatening the city before it is too...

The Dragon Masters are still reeling from the desertion of Rori and her fire dragon Vulcan, when Mina, a Dragon Master from the far north, arrives with a problem--King Lars needs a fire dragon to defeat the Ice Giant who has frozen his kingdom; and so the Dragon Masters set out to find Rori and convince her to help.

The Dragon Masters discover that a Shadow Dragon named Chaya and his Dragon Master Aruna are responsible for a huge shadow stretching across the sky, but how do they have so much power and why are other wizards around the world losing theirs?

When Lord Garmadon uses his mega weapon to turn back the clock and bring an ancient monster back to life, the Ninjago try to stop him, but end up being turned into children instead.