11-year-old Chan-yi is looking after his lovely younger sister So-yi, by himself ever since their mother left them to find her own future. Despite their desperate situation of being abandoned by family and neighbors, these kids try their best to carry on life. One day, a little puppy joins this small family as Chan-yi steals it from an old couple's kennel as a gift his sister's birthday.

When loveable Labrador Maeumee has a set of puppies, Dong-Wook's grades start to suffer. Because of this, Dong-Wook's mother decides to get rid of Maeumee and the puppies. The dogs then stay at a relative's video shop until the animals can be placed into an animal training center. Meanwhile, two unscrupulous jewel thieves come into the video store and spots the little puppies. Hyeok-Pil decides to steal the littlest puppy to use as a runner to transport diamonds. Maeumee spots the two men taking away her young puppy and goes after the thieves! Can Maeumee save her puppy? Will Dong-Wook ever get to see Maeumee and the puppies again?