In 1868, after the Bakumatsu war ends, the ex-assassin Kenshin Himura traverses Japan with an inverted sword, to defend the needy without killing.
An apparitions of a young schoolgirl in a yellow rain hat, a family massacre, and a law student's suicide after he fails his bar exam are linked by the ominous recordings discovered on an audio cassette.
Set in the year 2020, following her supposed death, a young woman returns as the son of her noble family to precede the family's prestigious company, with a demon at her side to avenge her parent's murder.