Min-Gyu is a warm-hearted and cheerful animal-loving veterinarian. However, the animals in his care have many problems and diseases. This causes trouble with his girlfriend, Wha-Young. She gets really frustrated by the constant irregularities of his life and starts dating other men. Eun-Hae is a cheerful and proud photographer who has been going out for quite a long time with a libertarian artist, Jin-Woo. But Jin-Woo starts to date the museum curator Wha-Young and Eun-Hae becomes so angry that she decides to contact Wha-Young's ex-boy-friend, Min-Gyu, suggesting revenge. However, Min-Gyu and Eun-Hae begin to feel more interested in each other than in the process of revenge.