Plot
Maumi is a dog, the last present given to Dong-wook by his father who dies when his chronic illness worsens. Dong-wook finds comfort in Maumi, who fills the void in his heart left by his father with his death. He is devoted and affectionate to Maumi despite the opposition of his mother.
Maumi grows rapidly into an adult dog and gives birth to three puppies: Meokbo, Dodo, and Jangguni. Among them, Dong-wook has more sympathy and love for Jangguni who is born weak and small.
Dong-wook's mother is worried that Dong-wook is spending too much time with Maumi and is losing interest in classroom learning. Finally, she sends Maumi and her three puppies away to Dong-wook's uncle.
One day, the youngest puppy, Jangguni goes missing. That is because the Pil brothers who are jewelry thieves hatch a plan and nab Jangguni. Maumi chases the Pil brothers to save Jangguni. Can Jangguni nestle his head in Maumi's bosom again?
