There is an unforgettable experience for a female detective. It was the crime scene of a victim who had been tortured and killed by a sexual criminal known as a sex sadist. The scene remained littered with horrific evidence, leaving the detective crushed by terror and shock. The situation at the scene was not a simple murder, but a heinous crime entwined with sexual abuse and violence. This gruesome spectacle left a deep scar on the detective's mind, remaining even now as an unforgettable memory.