A team of private detectives is formed due to a sensational missing person case, and each member has their own secrets from the past. Each volume focuses on a seemingly independent and complex case, but in fact there is a hidden clue linking multiple cases to a major unsolved case fifteen years ago. In the process of pursuing the truth, the team collides with each other's beliefs, cognition and moral bottom line, while exposing the deep-seated contradictions in society and demonstrating growth, redemption and trust between the team. In the end, they successfully cracked the interlocking truths and witnessed each other's transformation.
