Welcome to the Hero Factory. A place where the most advanced and skilled Heroes in the universe are built to serve one function-- saving the world from evil. Rookie Rocka responds to a distress signal sent by a civilian, Aldous Witch, who has crash-landed on a protected planet. When Rocka goes missing, Stormer, Furno, Nex, Bulk and Stringer are sent to find him.

When Cole returns to Yang's haunted temple to seek revenge on the former Airjitzu master who turned him into a ghost, he accidentally uses a powerful dark magic blade that traps him in the temple and unleashes the spectral forms of Ninjago's greatest villains. While Cole battles for his freedom, the ninja must return their ghostly foes to the Departed Realm before they gain the power to remain in Ninjago forever. Also includes six bonus episodes from...