An all-new easy-to-read adventure based on the latest season of the hit LEGO Ninjago TV show on Cartoon Network! There's a new gang in Ninjago City -- the sons of Garmadon, named after Lloyd's dad. These crooks are tough, and they are determined to steal the famous Oni Masks. If they get all three masks, they could become all-powerful. It's up to Lloyd and the ninja to catch those crooks! Can they protect the masks -- and Lloyd's dad's good name?