One day, Amakusa Natsuki—the hope of the Tokyo Metropolitan Police Department—meets an unusual high schooler named Shiki Yuuya. Natsuki's interest in the high schooler is piqued after Yuuya happens to be passing through the scene of a difficult murder case and determines the perpetrator with ease. How did he know who the killer was? When an incident later takes place at Yuuya's high school, the two happen across each other again... Thus, a young policeman and a high schooler with a hidden power begin unraveling the mystery!

Based on the book of the same name which answers questions such as: "How many grams of flu medicine are needed to cause the death of a person?" "Could it be that a person can survive with just one kidney or one lung?" Or: "How many meters can a person survive from a fall?" The protagonist of the manga, Ikuta, a leading student of forensic medicine, will be involved in strange cases that require his attention.