Young girl Lin Wanqing depends on her ailing grandmother and young sister Duoduo for survival. The Belgian Malinois Qianjin, left behind by her father before his passing, is both her closest companion and a loyal, brave divine dog guarding the family's safety. Wang Erlai, a rogue in the village, covets Lin Wanqing and repeatedly stirs up trouble, only to have Qianjin foil every attempt. Refusing to give up, he schemes viciously one after another: trying to drug and steal the dog, only for Qianjin to turn the tables on him; waylaying and robbing grandmother's lifesaving herbs, only for Qianjin to chase them down and punish him; and even colluding with traffickers to kidnap Duoduo. Qianjin tracks down the culprit across miles, leaps onto a speeding tricycle to rescue the child, and completely subdues the villains.