After the party emerges out of the Tower, the party barely manages to escape into the subway from Su-Zaku who roams on the ruined overworld. In the subway, a girl invites the party to follow her. They eventually find her being attacked by monsters, but they are defeated by the party. She thanks them and before leaving, mentions to them that there's a town ahead. She leaves before telling her name.
The party travels through the subway while following So-Cho's hoverbike who leads them to the sewer. They follow the path that leads them right into the Atomic Power Plant.