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Interpol Tian Hao was ordered to investigate a murder case in a secret room. With the assistance of his friend Qin Yufeng, he successfully solved the mystery of the secret room, but he had no choice but to let the murderer go free because of the lack of evidence. However, everything was just the beginning. A series of secret room murder cases followed, and the design and killing methods of the secret room became more and more clever each time. Tian Hao pursued all the way, and when he gradually got closer to the truth, he discovered that there was something hidden behind the truth, and he himself gradually fell into an abyss of eternal destruction...

When consciousness suddenly returned, he found himself in a strange place with a stranger's body beside him. In order to protect himself, he buried the deceased on the spot. A month later, the deceased was found in another place. The body of his ex-wife and current boyfriend was dug up from the original burial place. "Someone is setting me up!" He realized this, but this was just the beginning of the nightmare...