Lee Kang Hoon (Sung Hoon) is the CEO of the world’s largest Korean subsidiary, D.O.L. One day, he is kidnapped and manages to escape from his captors, but he is bleeding so heavily that he collapses outside a veterinary hospital. Yoon Seo, a vet, finds him and treats him. Lee Kang Hoon is a handsome, wealthy heir who cares little for other people’s feelings, whilst Cha Yoon Seo is a cheerful and likeable vet. Can the mutual dislike they feel for one another turn into love?