Episode 7 - S1.E7

On her way to Suseo Station, Young-joo meets a very special person, who helps her reminisce on the good memories with Jae-yoon. She relentlessly fights the zombies alone on her way to Jae-yoon. Meanwhile, Jae-yoon and the squad successfully reach the 35th floor through the ducts, but they must find another way down to the first floor.