While investigating a series of bizarre deaths, Lu Chuan crosses paths with Gu Yan, a mysterious cardiothoracic surgeon. Initially at odds, the two gradually discover that they are connected in countless ways. As the investigation deepens, Lu Chuan uncovers a huge conspiracy behind the cases, while Gu Yan’s true identity slowly comes to light. As they pursue the truth, the two engage in an ongoing battle of wits, ultimately exposing the secret hidden in the darkness.
