Episode 7 (S01E07)

As Young-joo makes her way to Suseo Station, she encounters a unique individual who aids her in recalling fond moments shared with Jae-yoon. Determined, she battles zombies single-handedly on her journey to reunite with him. Meanwhile, Jae-yoon and his team successfully navigate the ducts to reach the 35th floor, but now face the challenge of discovering an alternative route back down to the first floor.