Based on the novel trilogy of the same name by Taku Mayumura.

In the new Calendar Year of 392, in Neo-Tokyo, a young man, Agino Jiro, steals a time synchronization system and tries to escape to the past. The authorities give chase and damage his ship in the pursuit, forcing him to land in modern day Tokyo, determined, he breaks into a van and attaches the device, recklessly kidnapping Nobucho, Shinichi, Teko and their teacher, Hokubei.

Their initial resistance force lands them in Tokyo on March 9th 1945, during the US bombing campaign. Escaping again to the past the group eventually arrives at the Warring States period. There the future and the past collide as factions from Jiro’s era seek to alter their past at a pivotal moment at Honnoji.