In Gangnam's renowned tower, filled with different shops, the narrative starts with Kang Ji-young, a receptionist at a dermatology clinic. Ji-young has been secretly involved with a married doctor from her workplace, but she begins to have suspicions that he might have another mistress—who appears to be uncomfortably familiar with her own office. Inside this single building teeming with a variety of individuals, unpleasant relationships and concealed stories gradually emerge...