A tragic rape ● murder ● incident occurred. Masumi Ozawa, a female investigator who firmly vows to arrest the culprit at the sight of her mother clinging to the victim's corpse and comforting her. One day, after several years of not being able to grasp the clues of the culprit, I regained the memory of that time that I had lost due to shock ... I was contacted by the victim's mother! The mother who claims that the man who seems to be the culprit who passed by immediately after the crime is Oshima, the president of a management consulting company. Masumi heads to Oshima's office alone to find out the truth, but ...