In November 1998, a double homicide occurs at the newly constructed Ogawa apartment complex in the heart of Mifune City. The murderer, Tomoe Enjou, has fled in a panic. To his astonishment, he is not pursued by the police and news of the incident has not been reported through media outlets. After Shiki Ryougi defends Tomoe from a group of thugs, she allows him to use her residence as a hideout. However, a few days later, Tomoe is shaken to discover that his mother is alive, even though he is convinced that he killed her. Coincidentally, Mikiya Kokutou is investigating a tip that his associate Touko Aozaki receives regarding the murder at the unique apartment complex. As he uncovers more information about the incident, Mikiya takes a particular interest in Tomoe. Deciding to investigate h