Part 3/7:
As her reality begins to feel increasingly unsettling, Kyung-min becomes entangled with Gi-Jeong, a coworker who persistently crosses boundaries and causes further distress in her life. Although another coworker, Seong-ho, proves to be a friend and ally, troubles escalate as an alarming pattern of strange occurrences unfolds.
Kyung-min's fears are confirmed when she discovers that someone has been intruding into her apartment, hiding and using her belongings while she sleeps. This gripping psychological tension peaks one evening when she accidentally uncovers the true identity of the mysterious intruder as well as their connection to Seung-hye, who has seemingly vanished.