After the loss of Zane, the Ninja question whether they are still a team. But when they receive a mysterious invitation to take part in the Tournament of Elements, they get a clue that Zane may be well and alive.
When the Ninja receive an invitation to partake in the Tournament of Elements and a clue that Zane might be alive, they accept and travel to a Lost Island owned by notorious crime lord Master Chen.
On the island, Lloyd learns that his father used to train under the deceitful Master Chen and when the Ninja meet the playfully deceitful ruler, they realize they are in a tournament where "Only one can remain."
In order find Zane, the Ninja stay in the tournament to get past the first round but Chen complicates things by changing the bracket and pitting Jay against Cole.
Chen pits everyone against each other in a ludicrous roller skating event called Thunderblade and all contestants team up against the Ninja; so the Ninja share inside information on Chen.
The Ninja have a secret alliance, Cole has found Zane and Nya is a spy within Chen's Kabuki to figure out what nefarious plot Chen is up to - but Chen upends the alliance by promising the Staff of Elements to the victor.
Nya has proof of Chen's plan but he entices the contestants to hunt her down with promises to advance the winner, forcing the Ninja in a race to get to her first.
After stealing the remaining contestant's powers, Chen only needs Lloyd's power to complete the spell and knowing his daughter has feelings for Kai, Chen tries to enlist the Fire Ninja by promising to share secrets.
Chen has failed to bring the return of the Serpentine War but Clouse reveals theres another way - his daughter has the ability to absorb the power of every fighter she comes across, so she can complete the ceremony.
The Ninja reunite with Wu and turn to the aid of a shrunken Pythor in order to figure out how to defeat the unstoppable Anacondrai - but before they can get answers, Pythor is abducted.
The Ninja and fighters discover there's a strategic location called The Corridor of Elders where they can make their last stand against Che's Anacondrai army... but their forces still aren't strong enough.
