After the events of Skybound, a new darkness threatens the Ninjago universe. Fishermen vanish from the seas, a violent storm brews off the edge of Dark Island, and Master Wu senses a growing imbalance between good and evil. When Misako and Ronin disappear, they leave behind one clue--a warning to stay away. As Master Wu and the ninja journey to Dark Island, they'll be faced with new and old threats alike. Will their Spinjitzu and mastery over the elements be enough to stop the end of the world?