The investigators enter the sunken city and discover a certain number of worshippers of the Sand Bat, which they manage to defeat. In doing so, they attract the attention of the secular inhabitants of the place - an immense pile of slimy flesh that reminds them of Eleanba Wanda. This creature dislikes intruders, and our heroines come very close to death before fleeing.

They then explore the excavated part of the gigantic city, before discovering Robert Huston's headquarters. During their confrontation, Huston manages to convince the group that his death would be of no use to them, as the plan is already in progress and is now easily replaceable. The group leaves and finishes its exploration of the place. The investigators then discover a non-hostile alien, locked up in a prison. He communicates with Brenda telepathically and offers to help her escape in exchange for valuable information about the plan of Huston and the other survivors of the Carlyle expedition, which the team accepts.

After several weeks of manually extending the excavations, the investigators and their unusual guide reach a building that apparently served as a library. There, the creature breaks free from Huston's grip and provides a variety of information about upcoming events. In addition, she suggests that the group go back two weeks, so as to make up for the time lost in the City. Not feeling able to bear such a shock, Brenda chooses to stay behind and take care of Huston and his associate Kouris. Lise and Setsuna accept, and find themselves at the entrance of the city, two weeks later.