Hyun-woo (Ji Sung) is the reluctant future successor of his father's chemical company and engaged to be married to Soo-jin (Lee Bo-young). Eun-soo (Eugene) lives a simple life, running a bed and breakfast with her elderly father. Their two lives collide one fateful night when after a failed attempt on his life, Hyun-woo loses his memory in a car accident. Discovered on the roadside by Eun-soo and her father, they take him in and nurse him back to health. Over the course of his recovery, Eun-soo and Hyun-woo (whom she has named "Baek Chang-ho") fall in love.  On the day of their engagement, Eun-soo's father passes away. Following another attempt on Hyun-woo's life and a resulting accident, Hyun-woo regains his original memory but forgets the year he spent with Eun-soo. He leaves Eun-soo and seek out his past life.  Eun-soo is determined to find her lost love and travels to the city where she meets Hyun-woo again. Slowly Hyun-woo falls in love with Eun-soo again. A close confidant of Hyun-woo, Tae-min is revealed as a traitor seeking to gain control of Hyun-woo's company. Tae-min is ultimately exposed and Hyun-woo regains ownership of the company.  In a final desperate attempt to get revenge on Hyun-woo, Tae-min tries to run him over, but instead of Hyun-woo showing up, Eun-soo does. This accident paralyzes her from the waist down. Refusing to be a burden to Hyun-woo, Eun-soo disappears and works as a teacher at a home for disabled children. Until one day, Hyun-woo sees a familiar drawing, and after a year of searching, he finds Eun-soo and the lovers reunite. The final credits show Eun-soo slowly learning to walk again with Hyun-woo's assistance.