In the wake of Overlord's defeat, Ninjago City is reborn and the ninjas teach at Sensei Wu's academy. But the peace doesn't last long.

The Nindroids use the Golden Weapons to transform the Overlord into the Golden Master. In the ruins of Ninjago, the ninjas prepare their final stand.

Faith arrives with news of an invasion, forcing Lloyd to consider making Lord Garmadon an ally.

Despite their grave doubts, the ninjas free Lord Garmadon from Kryptarium Prison so that he and Lloyd can enter the cloud of darkness.

The team pays a terrible price when they attempt to rescue Lloyd and Lord Garmadon, who discover the Oni's weakness while battling the Omega.

The ninjas visit the mayor with an unusual appeal: to request the release of one of their worst enemies from Kryptarium Prison!

In a strange twist of fate, the ninjas successfully break Aspheera out of prison. But to save Nya, they'll also need to steal back Aspheera's staff.

As they wait in the monastery for the ninjas to return, Aspheera and Master Wu compete in a series of tests of strength and cunning.

After freeing Aspheera to save Nya, the ninjas land up in Kryptarium Prison, where they are surrounded by their old enemies.

Crystal spiders continue to recruit villains to join the council of the mysterious Crystal King. Nya is reminded of her days as Samurai X.