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, 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.