Ran Yan has a secret admirer. He ends up giving her a clue about why the victim's horses gathered at a certain spot in the wilderness. They find a strange vehicle with a secret code that gives Xiao Song a headache. The message says the four victims will be executed at a specific time. Su Fu shows up to learn the details of the case. Xiao Song suspects Su Fu has another identity. (Source: jindreame at MyDramaList)