Son of the Raging Tide

(AU) Kai was always happy to let his sister and their friends go on adventures and fight evil while he stayed home and kept an eye on the Bounty. Being a ninja just wasn't his thing. But when Lloyd is taken hostage by a jealous ghost and the ninja's powers are stolen away on a breath of wind, it may be up to Kai to finally master an element of his own - the most terrifying element of all.