Han Ji Yool works as a veterinarian in Seoul. One day, he receives a phone call from his grandfather. His grandfather doesn't mention specifics, but his voice sounds serious. Han Ji Yool decides to go to Heedong Village, where his grandfather lives and runs an animal clinic. There, Han Ji Yool meets police officer Ahn Ja Young. It turns out his grandfather is actually touring Europe. According to the note left by his grandfather, Han Ji Yool has to take over his grandfather's animal clinic for a half year, while his grandfather is away.