The ninja Masters of Spinjitzu and their Sensi Wu face their most danger opponent when they enter the tomb of the dreaded two-headed Fangpyre and do battle with his legion of snake-men! Against the combined might of the four tribes of Serpentine - the criminal Constricai, the vengeful Venomari, the hateful Hypnobrai and the fiendish Fangpyre have Jay, Cole, Zane and Kai have finally bitten off more than they can chew!?