Description：A series of serial murders attracted the attention of Sheriff Thorne (David Morrissey). This vicious murderer already had three lives in his hands, but the fourth victim escaped death by chance. Both the police and the public believed that this was the result of the murderer's negligence. However, the terrible thing is that it didn't take long for Thorne to find out that it was not the murderer who made the mistake, but himself, because although he saved his life, the survivor could not provide any information. Several murders committed at the same time and in two different locations using the same method made Sheriff Thorne very alert. As time went on, the fog gradually cleared, and he found that what he had to face was not just a bloodthirsty and brutal killer, but two people who colluded with each other in secret and betrayed each other.