The ninja get an invatitation to an island to participate in the Tournament of Elements. Deciding to keep it hidden from Garmadon and Wu, worried what they might say, the ninja sneak away in the middle of the night to board the ship to Chen's Island. Garmadon ends up piecing it together and reveals he has a history with Chen. The ninja also discover they are not the only elemental masters. Chen has a nefarious plan in the works, but will the ninja be able to figure it out in time?
Thirteenth Release in the Crossover Cinematic Universe. Next release: Uncanny X-Men: Weapon X