Peace has returned to Ninjago and the Ninja have grown complacent. Rumours of Lord Garmadon's return prompt them to investigate, but they only find Garmadon's son, Lloyd Montgomery Garmadon, who escaped boarding school, causing mischief. Driven by a desire to become the evil warlord like his father, Lloyd fortuitously uncovers the Tomb of the Hypnobrai Tribe of the Serpentine and releases them. The Ninja come across the prophecy of the legendary ‘’Green Ninja’’ and, believing one of them is dest