Seikichi invites all the residents to accompany him in rescuing Sora. Tenho and Tenten find out that Sora is inside an underground dungeon of Mizuno's castle. Oriku allows the residents to plan out their next move at her family shop. Ginjiro is assisted by Oise, along with Tenho and Tenten, to escape from Torii and to be brought to the old man. Seikichi catapults himself toward the dungeon, Ginjiro captures Mizuno, and Oise prepares to fight the blue girl. Seikichi wants to free Sora, despite her appearance as a monster. Akai lets the two escape out of the dungeon, but he then fires a gunshot directly at Seikichi.
ソラが鳥居に囚われてしまった。千代田の城こと江戸城には家康が作らせたと言われている地下の抜け穴があり、そこに閉じ込められたのだ。大胆不敵にもソラの救出作戦を立てた清吉たちだったが、お上に目を付けられた風来長屋に戻れない。だが、その準備の場所として鍵屋の工場を使いなさいと、おりくが申し入れてきて…。
