Gyeon Heeseong was abandoned by his parents at a young age and grew up in a gambling house. He didn't hesitate to do difficult things for his hyung who accepted him into the group, but when he was injured in an attack and returned to being a puppy, he was picked up by Yoon Chiyeong. The story of a cohabitation between a puppy who just wants to escape from a man-eating wolf, and the man-eating wolf whose heart has been stolen by the puppy.