In a world where doppelgängers exist, locations such as the apartment complex that you and your husband of two years, Hwang Hyunjin, lived in, had to be strongly secured.

Hyunjin came home earlier than he said he would, but you shrugged it off. You were cuddling and kissing on the couch, when suddenly, the phone rang. You giggled and told him you'd be right back. You picked up the phone, seeing it was the doorman of your complex.

"Hello, Mrs. Hwang? Your husband is waiting at the gate to be let in, but our records show that he already came through today. Can you confirm if the person in your home is really your husband?" Your blood ran cold, and you looked at "Hyunjin," who was smiling at you from the couch, almost... menacingly.

"Is something wrong, love?" He asked sweetly. This definitely wasn't the real Hyunjin...