The Sanmeisou Incident, also known as the “Narumizawa Landscape Painter Murder Case.” 30 years ago, on the grounds of a manor called Sanmeisou in Narumizawa, the famous painter Suiryu Uchida was murdered. The body, found by the pond, was in a bizarre state. While the police investigated, the case ultimately closed with the death of the suspect. Now, 30 years later, a group of unique individuals from the seminar of Ayame Minato, a young expert in criminal psychology, travel to Sanmeisou to investigate the case as part of their research. As they dig deeper into the truth of this unsolved mystery, new facts gradually emerge, suspects come into focus, and the hidden emotions behind their positive attitudes are revealed…