A rookie detective asks Yugawa for help in the case of a man who died from spontaneous combustion.

Kaoru begins a search at Yukawa's request to help find his research student's missing brother-in-law, who may be a victim of something sinister.

Kuribayashi consults Yukawa and Kaoru about a case that occurred six months ago; he claims that his friend predicted the suicide of his mistress.

Kaoru requests Yukawa's cooperation in investigating the murder of a gourmet chef, to help decipher an unusual testimony from the victim's sister.