The story takes place in Fukagawa during the Edo period. The protagonist Aichi is a girl who dreams of becoming a doctor. She has a special ability and can hear the voices of those who died with regrets and see their figures.With the help of Aichi, who has a cheerful and positive personality, his father Shoan, who is a town doctor, and Goro, the head catcher, approach the darkness of human nature and solve the mysteries of various incredible events.

The play combines elements of mystery and fantasy. It is a costume drama that depicts the protagonist solving cases and achieving growth through his own abilities.

Aichi (Aoi Wakana) aspires to become a doctor and helps her father Matsuan (Tamaki Hiroshi) in his clinic.She has the special ability to see the undead that are entangled around normal people, and she can also communicate with these undead.The blind date was introduced by his aunt Outa (Naomi Saizen), and Naosuke (Shinnosuke Abe), the young master of the herbal medicine store Unoya, also has undead around him.

In order to help Naosuke, she tried to resolve the regrets of the undead, and learned that both Naosuke's first wife and maid Ame (Matsumoto Feisho) died suspiciously.

2 Aichi (Aoi Wakana) accepted the request of the undead, “Unoya”'s maid Ame (Matsumoto Feishiro), and saved the life of Naosuke (Abe Shinnosuke) who was poisoned.It was Sasuke (Shinji Rokkaku), the shopkeeper of Unoya, who instigated Amei's mother Akin (Asuka Kurosawa) to poison Naosuke.

Aichi and Sengoro (Masahiro Takashima), in order to inquire about the details of the death of Ame and Naosuke's first wife Kase (Eiriko Nakamura), went to Naosuke's father, Naosuke, the boss of “Unoya”Emon (Enoki Takaaki) is there.

Aichi (Aoi Wakana) went to visit her childhood friend Xiaofeng (Mizutani Kaho), but Xiaofeng died due to dystocia.Aichi came to the parade in search of his partner in the boat, but was entangled by two pleasure seekers. Fortunately, he got help from doctor Judou (Hayama Noriyuki).

Judou is a disciple of the doctor Yamaga (Omi Ridoku). He visits Matsuan (Tamaki Hiroshi) and expresses his desire to become Matsuan's disciple.During the conversation with Matsuan and Judou, Matsuan asked why Judou gave up studying in Nagasaki and even gave up becoming a royal doctor.

Aichi (Aoi Wakana)'s father Shoan (Hiroshi Tamaki) was accused by Juto (Hayama Nobuyuki) of killing his mother, which brought a huge shock to Aichi.Age (Naomi Zaizen) explained that during the period of Yin disease, Shoan had treated the scrap shop couple and the daimyo's daughter at the same time. The scrap shop's wife, Judou's mother, was ultimately unable to be rescued, and her condition suddenly worsened.And died.

Later, Judou was called and Shoan began to tell the truth.It turned out that Shidou's mother was pregnant at the time, but due to physical weakness and premature birth, both mother and child died.

Shosuke (Hirano Nari) is a patient in the clinic of his father Matsuan (Tamaki Hiroshi). He comes to the clinic for help and tells Matsuan and Aichi (Aoi Wakana) that they always feel that their dead sister Akyo is alive in their bodies.

In order to solve the mystery, Ashi moved to Zhuangzhu's house.Shinkichi (Asuka Kudo), a decoration craftsman who works at Shosuke's house, is considered to be related to the Nighthawk murder case that caused a commotion.Aichi and Sengoro (Masahiro Takashima) believed that Shosuke's incident was also related to this, so they began to look for Xiaofang (Moeka Honoshi) who held the key to the incident.

In the いさご屋 where Aichi (Aoi Wakana) is stranded, the boss Jihei (Shōki) testifies that he was stabbed by his late daughter Akyo.

On the other hand, the maid of “いさご屋” Yusei (Houshi Moeka) also disappeared. She was attacked by a man, and was finally rescued by Sengoro (Takashima Masahiro).Sengoro was asked by Yuki to help the young Shosuke (Hirano Nari), so he summoned the people of “いさご屋”, and brought together Yoshibei's wife Yutomi (Kuroda Kuroda) and Fantou's assistant (Wakichihiro).) brought to Banya.However, things are not that simple.

Takiyo (Yukawa Hina) was killed shortly after giving birth to Jusuke.Judging from the short sword left by Takiyo, it can be inferred that she was a samurai, and there seems to be a complicated story behind her.The surviving Jusuke was said to have been taken up by Satoko, and later sent to the Azuma House run by Yuki (Silver Pink Butterfly) and others.

Soon, samurai who came from their hometown to search for the whereabouts of Takidai and Jusuke appeared.The man who calls himself Sugino Kojuro (Kenta Suga) tells the surprising life experiences of Takidai and Jusuke.