When a mutilated body wrapped in a blue tarpaulin is found in a quiet neighbourhood, Lieutenant Reiko Himekawa and her squad are assigned the case. As the youngest female detective in the Homicide Division, Reiko has a lot to prove, but she has an undeniable ability to solve crimes. When she uncovers more murders with the same signature, she know sthere is a serial killer at work.What is Strawberry Night, the dark web group that links all the victims? And how long will Reiko survive, now the killer knows her name?