My name's Kai. I'm the current master of fire, and my little sister Nya is the current master of water. Our mother was the first water elemental and our father was the first elemental master of fire. The two of us train with four others. Long story. We all thought it was over when my sis drowned the Preeminent and Morro gave himself up. But, here in Ninjago, the path we're on is never a straight line. A few ghosts escaped the wave my sister crashed onto the Preeminent. Without their world or leader they'd be weak, right? Right? The answer is no. They teamed up with some other enemies with a vengeance for me, my sister and our friends. It's up to us to save Ninjago, all while my sister and I have to work out a...PERSONAL issue... I'm scared of water, so how will I make it through the aqua tests while keeping myself in check?