This is a story about the Ninjas' grandkids. The grandkids have to go to school, because their parents and grandparents forced them too, and because there is no threat. Because of cupid and his arrows, all the grandkids are cousins and siblings. And they all live in the Monastery. Somehow, the Monastery has enough rooms for all of them. So Nya and Jay got married and had Amy(lightning) and Aiden(water). Zane and Pixel adopted Tyler and passed the element of Ice to him. Amy married Tyler and had Georgie and Georgia. Lloyd and Akita married and moved to Ninjago and had a girl called Caroline. She married Aiden and had Arabella and Luca. Kai and Skylar had Leo and Leah. Cole married Queen Vania and had Charlie. Leah married Charlie and had Amelia, Liam, and William. When people start dying suddenly, the government and ninja start to investigate. However, they seem to be dying of an illness, which is why the ninja don't think of a much bigger threat when uncle Leo dies. Will the ninja find the person who is responsible for the deaths? Or will everyone perish to the so called illness?