Season 1 focuses on the Ninja (Kai, Jay, Cole and Zane) fighting to determine whose the green Ninja (a ninja who is destined to fight the evil Lord Garmadon). Sensei Wu is struggling to maintain and teach his Ninja students. On the other hand, Lloyd Montgomery Garmadon (the son of Lord Garmadon and Misako nephew of Master Wu descendant and grandson of the First Spinjitzu Master and descendant and great-grandson of Firstbourne and Omega) accidentally releases the serpentine army to attack the ninja. Pythor is the main villain of season 1 & his main goal is to get all the fangblades to free his master and mistress 'The Great Devourer', so he can get destroy Ninjago city. Pythor is consumed by the Devourer, and the Devourer is destroyed by evil Garmadon (who uses the golden weapons), & later on steals the Golden Weapons. Also it was revealed that Lloyd (whose life was saved by Kai, due to his true potential) is the green ninja. And everything goes out of hand when a son has to fight his father.