Everyone has turned into crystallized zombies and the overlord took over Ninjago and you're the only one left that isn't turned into a crystallized zombie or at least you hope but at the same time you're extremely special with a gift when you were born all of the elemental Masters that were left gave up their powers and moved on living their lives until they had to become crystallized zombies and you're the only one left that can save Ninjago once and for all also 10 years have passed in Ninjago