It's the snake war between the humans and the Anacondrai. Wu and Garmadon contacted every elemental master. Libber, Master of Lightning. Nathan, Master of Ice. Scarlett, Master of Shadow. Scott, Master of Gravity and the masters of time, the twins, Krux and Acronix.

they're all in the monastery planning on how to defeat the Anacondrai and bring peace to Ninjago once again