Yoon Hee, a divorced plastic surgeon, is satisfied with her life as she has a lovely daughter, Hyun Su, who perfectly obeys her mother. However, this happiness comes to end as her patients, also friends of Hyun Su, commit mysterious suicides in front of her daughter. On the other hand, feeling suspicious of her mother and her past, which are partially unveiled, Hyun Su, tries to find the clue in the hidden basement of their house. (Source: AMW)