Chen Dong, a young man, was secretly attacked by someone and, after becoming mentally impaired, wandered into Qingshan Village for three years. Only after an unexpected incident did he regain his senses, revealing that he had once been the Dragon Marshal of the Northern Frontier, who had driven back a million enemies with a single sword strike. His foolishness gone and the War Dragon returned, Chen Dong's transformation sends Qingshan Village into an uproar. Using secret techniques to raise fish and lead his entire family to prosperity, he also humiliates the village bullies and villains, rescues the village beauty Xia Qingqian, gets acquainted with restaurant owner Yao Yulu, uncovers the truth behind the plot against him years ago, and wins the hearts of beautiful women.