Set in modern day Tokyo, Shishio Homare (“Sherlock” in the original story) works as a crime consultant freelancer. Ever since he was young, he had always been interested in how people turn to criminal masterly, as well as the original basis for human sin. And, he is known as a ‘genius’ for having solved many kinds of mysterious cases and strange occurences, but on the other hand, his sudden impulses for criminal behavior, puts him at the risk of getting caught up at the wrong end of a stick.