Due to an explosion, Hyung-in’s partner Si-jeong gets injured, which devastates Hyung-in. This makes him drop the case. However, a key suspect of Jae-young’s case, Kim Hwan-kyu turns himself in. Jung-hyun hears from Jae-young’s friends that Jae-young had sent them a message a month before Kim Hwan-kyu turned himself in, and this makes Jung-hyun believe that Jae-young is still alive.
