One of the Grasshoppers gets away from the police. The other two Grasshoppers confess that they only know him as Han Tae Woong, although that name turns out to be a fake identity. The investigation reaches a dead end and Ji Seok is about to be reassigned to a remote island. Ryung comes up with a plan to save Ji Seok and to catch the Subway Ghost.
한태웅의 도주로 지하철 유령 수사는 답보 상태에 빠지고.. 설상가상, 지석은 지경대를 떠날 위기에 처하게 되는데!
유령은 지석을 구하기 위해, 당찬 계획을 세운다.
