Akane Tendo meets her new fiancé, Ranma Saotome, a martial arts prodigy with a twist: he magically transforms into a girl upon touching cold water.

In the era known as Bakumatsu, there was an ishin assassin known as Hitokiri Battousai; eleven years later he returned as a wandering swordsman, Himura Kenshin.

To save his mother, a kind-hearted boy and his tiny daemon friend set out on a journey across post-apocalyptic Japan as dark forces close in.