The protagonist of the film is a young woman named Eun Yi, played by Jeon Do-yeon. She takes up the position of a maid in a wealthy family. Eun Yi's arrival was originally intended to assist the family in maintaining daily operations, but she soon discovers that she has been drawn into the power struggle within the family. The male head of the family, Hyun, develops a forbidden love with Eun Yi. This relationship not only causes internal conflicts within the family but also exposes the ugly reality within the aristocratic society.