A wealthy heiress left her family to be with a poor young man, living under a false identity for three years while helping him quietly launch his company. However, when she joyfully attended what she thought was her own engagement party, she discovered that her boyfriend was proposing to another woman who was impersonating her as the heiress. Just when she found herself alone and helpless, her three powerful brothers showed up to support her. From then on, she began a life surrounded by their protection and, with their help, successfully sought her revenge.