Kawasemi Omito, a supremely skilled detective, leads a joint investigation into a serial killing case. Amamiya lends him Toto, whom Kawasemi deems so useless he's invisible. Ron appears at the newest crime scene as a consultant, irritating Kawasemi.
That day, Yamane was missing
 a button on his sleeve.
في ذاك اليوم، كان هنالك زرّ ناقص
من كمّ ياماني
An jenem Tag löste sich ein Knopf
an Herr Yamanes Ärmel.
Ese día a Yamane le faltaba
un botón de la manga.
Ese día a Yamane le faltaba
un botón de la manga.
Ce jour-là,
Perché quel giorno
mancava un bottone alla manica di Yamane.
Naquele dia, estava faltando
um botão na manga do Yamane.
В тот день…