A big case hits Tamagawa Police Station – persons unknown murdered a family of four. The time of death was estimated to be between 10:30 p.m. on January 3 and 12:30 a.m. on January 4, 2003. A special investigative team is quickly established with talented officers from headquarters and other stations. Several detectives from the Tamagawa Station join the team, including a young uninspiring Ichiro. However, soon after entering the team’s office, Ichiro is pulled off the case. It is ostensibly because he is investigating a case against the orders of his superiors…