Ni Xiang Dong received a request from his friend Cao Xiao Jun late at night, asking him to deliver a wooden box to an abandoned hut on a barren mountain. Don't ask too much, don't tell anyone, otherwise you will be killed.
He was horrified to find that what he was delivering was Cao Xiao Jun's body. Cao Xiao Jun's wife Wu Xi Mei called the police to find her missing husband and hinted that everything was related to Ni Xiang Dong. It seemed like Ni Xiang Dong was being framed, and he had to catch the real murderer before the police.
However, as a witness, Wu Xi Mei's confession was inconsistent, and the couple's child was not Cao Xiao Jun's biological child. Under the police's serial questioning, Wu Xi Mei had no choice but to tell the past of the three people. It turned out that the three were good friends, Wu Xi Mei and Ni Xiang Dong were a couple, Ni Xiang Dong was unwilling to take responsibility for the child, Cao Xiao Jun stepped forward to take her away and raise the child together.
Veteran police officer Meng Chao and rookie Tong Hao pursued the case from the cold northern coast to the humid southern forests, uncovering a serial murder scheme that had been entangled with Wu Xi Mei, Cao Xiao Jun, and Ni Xiang Dong for more than a decade.
