Penny Moore, the eldest daughter of the Moore family, is secretly joining the company to gain grassroots experience. When Penny's father, feeling sorry for her, announces that his eldest daughter will be working at the grassroots level, it sets off a chain of events. On Penny's first day, she encounters Karen Moore, a high school classmate. Karen, clad in luxury brands, is mistaken by everyone as the true eldest daughter of the Moore family. Colleagues Natalie and Victoria, eager to impress Karen, team up with her to bully Penny at work. Even the proposal Penny worked on all night is usurped by Karen. Despite Penny's protests, the vice CEO favors Karen, believing her to be the real eldest daughter. Fuelled by vanity, Karen invites everyone to a birthday bash at a villa, only for Penny to discover upon arrival that it's her own villa! Karen and her cohorts mock Penny at the party. However, beneath a sofa, Penny finds her long-lost ring, which Karen falsely accuses her of stealing. Fed up, Penny presents the property deed, revealing the truth and turning the tables on Karen and her allies.
