At the dawn of the financial crisis in 1997, many wealthy families were left bankrupt overnight. The envisioned future of two best friends, Boum and Ib, also went down the drain when their families' assets were seized to pay off their debts. Unable to face reality, the two decided to end their lives together at the unfinished tower of a premium luxury condominium that their parents had jointly invested in. However, only Ib went through with the promise. Now, twenty years later, Boum has become a successful real estate entrepreneur. She returns to visit the abandoned tower with her daughter Bell. After the visit, Boum discovers that Bell has started sleepwalking and her action eerily resembles Ib's.