怒吼吧，小狗！

A small male puppy named Bunbun was abandoned by his owner shortly after birth. During his journey to find his mother, Bunbun encounters a gentle old stray dog named Nora and other dogs, growing stronger and more resilient along the way. Will he be able to reunite with his mother safely? The mysterious man who owned him is actually a fighting dog breeder. In order to train Bunbun into the strongest Mastiff capable of defeating an Alaskan polar bear, he deliberately released the puppy into the world of stray dogs.