Following the Azure Messenger's bomb threat, the Armed Detective Agency must race to prevent the deaths of hundreds, which would taint the Agency forever. However, Dazai's seemingly distracted by Sasaki Nobuko, the lone survivor of their raid on the abandoned hospital...
"capable of causing mass destruction in a 
certain location here in Yokohama City."
قادرة على التّسبّب في انفجار هائل"
".في منطقة معيّنة من مدينة يوكوهاما
eine große Bombe
zur Tötung platziert.
une bombe très puissante
quelque part dans Yokohama.
in grado di compiere una strage,
da qualche parte qui a Yokohama.