Li Jin Shui and Po Bu Wan make up a story to tell the detective. The detective in charge gives an ultimatum for them to keep the undercover project alive, but it means catching two criminals. Jin Ji Zhai suspects Li Jin Shui of working with the police. Po Bu Wan sets up surveillance to spy on someone. Li Jin Shui gets information about one of the criminals, but the informant wants help catching a killer or he will reveal that Li Jin Shui is working with the police. (Source: jindreame at MyDramaList)