Yamaguchi Hana, a half Korean, half Japanese cartoonist, was extremely popular in Japan until her publisher decided to end her comic. At the same time, Hana discovers the love between her neighbours that lasted 70 years. For someone for whom love is merely hormones, Hana finds it impossible to believe that, and so travels to Korea to unravel the truth. While there, she enlists the help of a fan, Go Jin Pyo -- who falls in love with her at first sight -- and Kim Seok Man, a private investigator whose view of love is the complete opposite of Hana's. As the three work to discover the story, and eventually get it published they learn a bit more about themselves, each other and what love really is.