Jay's machine goes wrong bring 2 riders and their dragons to Ninjago. The ninjas scramble to keep the scaly beasts and bizarre riders out of the public media. While Jay fixes the machine that brought them here. There is only one problem dragons need to stretch their wings every once and awhile. Warning read my first book NINJAGO AND HOW TO TRAIN YOUR DRAGON CROSSOVER (I know great title) or else you will be cunfused