The girls encounter a woman named Ishii who offers to fix their vehicle in exchange for helping her. Together they finish constructing a simple airplane which Ishii is building from old plans in an effort to escape and reach the city's upper levels. Once completed, Ishii sets off in her airplane, only for it to fall apart shortly after take-off. Luckily, she manages to parachute out safely and she slowly drifts down to the lower levels of the city.
- Ishii makes her first appearance in this episode.