Seven years ago, top forensic doctor Su Tingwan sadly passed away due to the "betrayal" of her husband Chen Jin. Seven years later, several flawless "perfect suicide cases" forced her to return to the city bureau, and the person connected with the case was her ex-husband, who is now a high-ranking detective. Under the official business, trust is completely shattered in the past. As the investigation deepened, all the clues vaguely pointed to Chen Jin's unexposed undercover experience. When Su Tingwan uses a scalpel to get closer to the truth, he must also cut open his own heart to determine whether the familiar yet strange man in front of him is the guardian of justice or the abyss itself.
