Cheon Hayeon, the eldest daughter of the Cheonha Group family, has spent her entire life hidden away in the basement of the family mansion. After a ruthless scheme costs her father his life and leaves her younger sibling in a vegetative state, Hayeon changes her face and infiltrates her enemy’s home as a housekeeper. Determined to uncover Ha Musik’s secrets, she sets out on a ruthless path of revenge to reclaim her family—and the Cheonha Group empire that was stolen from her.