When Zhang Fan and his brother Wang Qiang and his wife were climbing a mountain, they stayed at the camp due to stomachache. Wang Qiang's wife Lin Xian'er suddenly broke into the tent and revealed the truth about Wang Qiang's affair with Zhang Fan's wife Liu Ruyan, hoping to join forces for revenge. The next day, there was a car accident on the way up the mountain. Liu Ruyan and Wang Qiang were killed mysteriously, and Zhang Fan was framed by Lin Xianer. With the help of blood test results and police investigation evidence, Lin Xianer's murder conspiracy was exposed, and the mystery of the driving recorder left a secret foreshadowing for the story.
