On a cold autumn night in 1978, the lost Heroton walked into a remote farm. The farm owner and his wife warmly entertained the uninvited guest. The host and guest drank and chatted together, and the conversation was very speculative. Unexpectedly, the greed of human beings led to a bloody tragedy... Four years later in the winter, Officer Mulz was responsible for investigating the murder case. He and the important witness Heroton went to the scene for verification. The perfunctory investigation, the suspect's recollection... In the chaos, the shocking truth gradually emerged...