Bunbun is a small male puppy who was abandoned by his owner shortly after he was born. On his journey to find his mother dog, Bunbun meets Nora, a kind old dog, and other dogs, and grows up to be a strong dog. Will he be able to reunite with his mother safely?

Bun Bun's owner, a mysterious man , is a dog fighting breeder who purposely released Bun Bun into the stray dog ​​community in order to train him into the strongest Maschief dog that could defeat Alaska 's polar bears.