[Machine Translation] An indiscriminate shooting incident at a huge shopping mall (Swan). In the midst of the tragedy that left 21 people dead, a high school student, Izumi, survived the shooting while being in close contact with the shooter. However, her classmate Kozue, who also encountered the incident, reveals to a weekly magazine that the crime was committed by Izumi's nomination of who to kill next. Izumi is now the target of criticism from the victim. In the midst of all this, she receives an invitation. The people gathered there are five people who were involved in the case and survived. The purpose is to reveal the truth of one of the incidents (death). What really happened that day?