S1, E4: The head detective Seong-sik tracks down Gwang-ho's behavior since he suspects Gwang-ho; however, Seong-sik notices something that he cannot believe. Gwang-ho tries to find his wife 30 years ago, but cannot find her.

S1, E4: The head detective Seong-sik tracks down Gwang-ho's behavior since he suspects Gwang-ho; however, Seong-sik notices something that he cannot believe. Gwang-ho tries to find his wife 30 years ago, but cannot find her.