

RIU Team One finds a witness to the murder case. However, the witness states Tae Sik is not the culprit. He provides a drawing of the murderer, and he looks similar to Choi Du Man. But when the team gets to arrest him, Du Man is already dead. The case becomes a bigger mystery. Who is the real killer?
A murder case happens in Hongwoon, and Su Young is the first officer who sees the scene. Because of the rain, the scene has been demaged, but Su Young can memorize the scene in detail. Ha Young recognizes Su Young’s ability, and Ha Young brings Su Young to Hyun Jae. Meanwhile, a man comes to the police station saying that he is the murderer.
Su Young tells Hyun Jae that she wants to join the RIU, and Hyun Jae asks her why she wants to join the RIU. Su Young becomes a temporary teammate of the RIU. RIU tries to find another victim who might be alive. Su Young gets into danger while the investigation and Hyun Jae helps her at that moment.