Tangguo is playing in the park with her little dog Chuoqian and her Malinois Qianjin when she bumps into a bag thief. Tangguo immediately tells Qianjin to chase the thief. After a chase and a fight, Qianjin subdues the thief and retrieves the bag for the owner. At this moment, instead of thanking Tangguo and Qianjin, the owner complains that the little dog bit and ruined her luxury bag. When Tangguo tries to reason with her, she gets scolded by the owner instead. Feeling helpless, Tangguo can only take Qianjin and Chuoqian and head home feeling down. But right at this moment, Tangguo's older brother is abducted by human traffickers on his way home from school. A worried Tangguo leads her little dogs Qianjin and Chuoqian to save her brother, and a battle of wits and courage between humans and dogs begins right then.