Ken Tajima

When a massive, gilled monster emerges from the deep and tears through the city, the government scrambles to save its citizens. A rag-tag team of volunteers cuts through a web of red tape to uncover the monster's weakness and its mysterious ties to a foreign superpower. But time is not on their side - the greatest catastrophe to ever befall the world is about to evolve right before their very eyes.

Shishio sets sail in his ironclad ship to bring down the government. In order to stop him, Kenshin trains with his old master to learn his final technique.