One day, he encounters Seita, an orphaned boy who survives by pickpocketing.
Seita has only one wish: to be reunited with Hinowa, the mother he was separated from as a child.
But Hinowa is in Yoshiwara Tougenkyou, an underground city beyond the reach of the law, ruled by the Night King, Housen.
Unable to ignore Seita’s desperate wish, Gintoki and the Odd Jobs crew step into Yoshiwara.
Their decision soon sets off a massive conflict that threatens to shake the entire city…