Two teenagers from different worlds use their newly discovered Ninja powers to defend dragons from villains who want to use their life-force for evil.
Efter en periode med fred står vores fire ninjahelte over for en ny farlig fjende. Lloyd Garmadon – søn af deres ærkefjende Lord Garmadon – har sluppet fire ældgamle ondskabsfulde slangeracer med magiske våben og enestående kræfter løs. Et forladt skib bliver det nye ninjahovedkvarter, og den opfindsomme Jay forvandler det til et flyvende fort. Ninjavåbnene viser sig at indeholde flere kræfter end man kan se med det blotte øje, og sensei Wu lærer ninjaerne at forvandle deres våben til stærke fartøjer, som kan hjælpe dem i kampen mod slangerne.
Der opstår splittelse blandt ninjaerne, da de hører om en ældgammel legende: Én ninja vil blive større end alle andre ninjaer og forvandles til Den Grønne Ninja, som skal kæmpe den ultimative kamp... men hvem?
In his quest for a bride to break his immortal curse, a 939-year-old guardian of souls meets a grim reaper and a sprightly student with a tragic past.
The story is set a hundred years after a war between the Empire of Snow (Ice Tribe) and the Fire Tribe, where the Fire Tribe was defeated. However, the war was fatal, leaving Prince Ka Suo and his younger half-brother Ying Kong Shi the only royal heirs and pure-blood ice illusionists left in the Ice Tribe. Conflict ensues after Ka Suo reluctantly ascends to the throne as his lover, Li Luo, and his brother go missing. Ka Suo also accidentally discovers an evil presence lurking in the Ice Tribe's holy shrine. He and his companions enter the mysterious shrine, and defeat head of the shrine, Lady Yuan Ji, only to find out that she has been plotting a conspiracy against him. Ka Suo also experiences hardships in trying to find his lover and brother, not knowing that his brother has lost all of his memories and has become the Fire Prince under his mother's command. A war between the two tribes commences once again, with the two brothers pitted against each other.
The Elemental beings known as The Hohki Dawners must team up and find the Elemental cubes in the regions of Xolvadus to reawaken the Goddess of the Ether, Xiarare and defeat Xumis, the Goddess of the Void