Totomaru Isshiki is a detective in Tokyo. He hasn't solved any big cases but things are going to change when he meets Ron Kamonohashi. Ron is a great detective; unfortunately he has lost his detective's licence. This is because of an incident, which he can't remember, where a suspect died. Whenever Ron catches a killer be can't help persuading that person to take their own life. An unofficial partnership develops. Over the course of the series they take on a number of cases and we learn more about Ron's past.
I thought this was an enjoyable anime series. The central idea is interesting as are the cases we watch our two protagonists solve. The character designs are good; a more realistic look suits the nature of the show. There are a few cases covered, each lasting a few episodes. It is clearly intended that there will be further seasons; the final episode raised several questions in an epilogue. Overall a solid show that I'd recommend to mystery fans.
These comments are based on watching the series in Japanese with English subtitles.