Hyun-soo, a delinquent, accidentally runs over Eun-dong with his bike. However, Eun-dong lies in court to protect Hyun-soo. As a result, Hyun-soo becomes fond of Eun-dong, and they gradually grow closer.

Hyun-soo runs into Eun-dong again and falls in love with her. However, he realizes that she is hiding something from him. Frustrated by his feelings for Eun-dong, Hyun-soo attempts to demonstrate his love.

The story of Ji Eun-ho and his long-lost love becomes a hot news topic. Offered to be his ghostwriter, Seo Jung-eun is excited to meet someone as famous as Eun-ho. However, she realizes that his stories are somewhat familiar.

Jung-eun gets confused by her memories regarding Eun-dong. Eun-ho gets annoyed at Jung-eun for ignoring his calls. Hyun-bal, Eun-ho's agent and friend, is surprised to see the resemblance between Jung-eun and Eun-dong.

Eun-ho tries to meet Jung-eun, but Jung-eun feels pressured by her family. Eun-ho's book is released, and Seo-ryung becomes furious because of its contents. Eun-ho realizes that the book has details from his past that he never told Jung-eun.

Eun-ho realizes that Jung-eun has amnesia and decides to stand by. Meanwhile, Jung-eun visits a district office and sees an old photo of herself. She begins to suspect that her understanding of her past may have been tampered with.