Yu-mi gets a job by using Hyun-joo’s university degree and even imitates the way Hyun-joo lives. After marrying a promising businessman named Ji-hoon, Yu-mi is satisfied with her life.

Yu-mi runs into Hyun-joo whom she had completely forgotten about. After that, Yu-mi lives every day in anxiousness. Meanwhile, Ji-won starts to get suspicious about Yu-mi’s past.

As Ji-hoon reaches closer to success, Yu-mi also receives the attention of the public. When Hyun-joo finds out Yu-mi stole her identity, Yu-mi’s cornered.

The relationship between Yu-mi and Ji-hoon worsen, and a scandal about Ji-hoon’s private life is exposed. Meanwhile, Yu-mi is confused

about her identity while also feeling guilty toward Hyun-joo. She believes everything’s going wrong.

Since Yu-mi can’t be controlled anymore, Ji-hoon plans to send her to a place where she’s cut off from the rest of the world. Yu-mi finds out about Ji-hoon’s plan and she also tries to execute her own plan through Ji-won.

Ji-won investigates to uncover Yu-mi’s past, but she becomes more confused the more she finds out. After much internal struggle, Yu-mi visits Ji-won to confess her past as well as Ji-hoon’s secrets. Shocked, Ji-won tries her best to understand Yu-mi. Yu-mi acknowledges Ji-hoon is someone too strong to break down, so she decides to be at the center of a scandal. Ji-hoon succeeds as a politician.

After seeing success, Ji-hoon can no longer stand Yu-mi and plans to send her somewhere cut off from the world. Yu-mi discovers Ji-hoon’s plan too late and tries to execute her own plan through Ji-won, but Ji-won finds herself up against a wall. Yu-mi makes an important decision and Ji-won thinks on her feet. The exposure of the couple's secrets stirs a storm, but what became of Yu-mi?