Wu opens a tea shop to help with his retirement and asks the ninja to help him advertise it. Lloyd is asked to go on a solo mission, but discovers that it is a trap set by a cursed spirit named Morro that has escaped from the Cursed Realm.

Wu reveals that the spirit that has taken over Lloyd's body was of his first pupil, the Master of Wind. The ninja then embark on a mission to save Lloyd. Wu and Misako tell Nya she holds a power she never knew about.

The ninja arrives in Stiix to find Ronin, who has the Scroll of Airjitzu. However, Morro is also on the hunt for the scroll and isn't too far behind.

Morro has the scroll. The Ninja find a new way to learn Airjitzu by visiting the Haunted House of Sensei Yang. Nya doubts she is the Water ninja, so Ronin takes her to Souri Cave.

Now that the ninja know Airjitzu, they prepare to hunt for the second clue to the tomb. They must embark to Cloud Kingdom and retrieve the Sword of Sanctuary. It's a race against Morro and his ghostly allies to get to Cloud Kingdom before the gateway passes.

In Cloud Kingdom, where destinies are written, the Ninja must get the Sword of Sanctuary by meeting with the Master Writer. But Moro's escape from the Cursed Realm has put the future in chaos.

The Ninja have the items they need for the tomb of the First Spinjitzu Master, but before they can figure out the last riddle that leads to the location of the tomb, Ronan steals the sword to give to Moro in exchange for his soul.

The ninja uses Ronin's airship to travel to the First Spinjitzu Master's tomb, but they find that Morro has beaten them to it. Can they catch up to him, beat the deadly tests and find the tomb before he can?

Morro, with the realm crystal, has opened a portal to the Cursed Realm and ghosts have taken over the City of Stiix. The ninja team go undercover to infiltrate the city and get Lloyd to the crystal before Morro's new master can arrive.

Lloyd is trapped in the Cursed Realm and the Preeminent has arrived in Ninjago. Now it's up to the remaining ninja to stop the Preeminent from cursing Ninjago, but her army of ghosts aren't making it easy.