The young Master Builder Lloyd, aka the Green Ninja, along with his friends, that are all secret ninja warriors. Led by Master Wu, is wise-cracking as he is wise, they must defeat evil warlord Garmadon, who also happens to be Lloyd's dad. Pitting mech against mech and father against son, this showdown will test this fierce but undisciplined team of modern-day ninjas who must learn to check their egos and pull together to unleash their inner power of Spinjitzu.
Ordinary teenagers by day, six young ninjas turn into gifted warriors at night, defending their island home from evil villains and monsters.