More and more people are disappearing in Ninjago City, while the ninja scramble to unlock the secrets of the Prime Empire arcade game. They decide to take the game to Cyrus Borg, hoping he can help them decode the programming and release all the players who have been taken (including Jay). Meanwhile, the Mechanic and his henchmen are resting in Kryptarium Prison when the jail's security systems begin acting up.
Long before time had a name, Ninjago was created by the First Spinjitzu Master by using the Four Elemental Weapons of Spinjitzu; weapons so powerful, no one can handle all of their power at once. When he passed away, his two sons swore to protect them, but the oldest, Lord Garmadon, was consumed by darkness and wanted to possess them all. A battle between brothers broke out and Lord Garmadon was struck down and banished to the Underworld. Peace returned to Ninjago as the younger brother, Sensei Wu, hid the elemental weapons in the far corners of Ninjago.