A prostitute from Hananoya, O-Taki, has been killed. When Takuboku says, "I saw Kyousuke in O-Taki's room," Kyousuke becomes a prime suspect. Meanwhile, based on the fact that Takuboku's romaji diary was left in O-Taki's room, Kyousuke begins to suspect that Takuboku might have done it. Where does the truth really lie?
I can hear it... the beat of your 
heart in your chest, Kindaichi-sama.
يمكنني سماعه... نبضات قلبك
في صدرِك يا كيندايتشي-ساما
Ich kann deinen Herzschlag hören, Kindaichi-sama.
Puedo oír los latidos de su corazón,
señor Kindaichi.
Puedo oír los latidos de su corazón,
señor Kindaichi.
J’entends distinctement
Sento
Consigo ouvir seu coração batendo
no seu peito, Sr. Kindaichi.
Я слышу... биение вашего сердца, 
господин Киндайти.