While out on their rounds one day, Tsugumi and Hisui learn of the existance of a book written by a prostitute from Yokohama's redlight district. Hisui seems especially desperate to get his hands on this book and when Tsugumi learns the reason why she becomes determined to help him. When Tsugumi discovers that Shiginuma Shouko, wife of the shady owner of the Nachtigal dance hall, she finds herself stepping back into potentially dangerous territory alone.
After all, a number of people 
died in the recent Migiwa case
في النهاية، عدد من الأشخاص ماتوا في قضية ميغيوا الأخيرة
Beim Migiwa-Fall neulich
sind viele Menschen gestorben,
Murieron unas cuantas personas
en el caso Migiwa
Murieron unas cuantas personas
en el caso Migiwa
Sauver votre réputation
ne serait pas de trop,
In fondo, è colpa del vostro scarso impegno
Afinal, um número grande de
pessoas morreu no caso Migiwa
Ведь те люди погибли
в недавнем деле с Мигивой