The two states of Xi and Yang, good and evil are in opposition and compete with each other. King Yang and Chu Kui are fighting on a large scale, and the war is raging. The loyal Xi King failed to resist Chu Kui, so he retreated to the north, raising troops and preparing for the day of attacking the enemy. The smart and kind Zhaixing met a wild boy on Wolf Hunting Mountain and named him Langzai. Langzai grew up in the mountains and forests. Although he was not educated, he was simple by nature and kind-hearted. He and Zhaixing were childhood sweethearts. Unexpectedly, Langzai, who was naive, was misunderstood as the murderer of an important official in order to save the young wolf and was hunted down. Although Zhaixing found out the real murderer and cleared Langzai's name, his brother Ma Jun interfered, making Langzai mistakenly believe that Zhaixing betrayed him. Langzai fell off a cliff and disappeared without a trace. Chu Kui, the Prince of Yang, who was passing by, saw that Langzai was talented, so he secretly adopted him as his son, and then appointed him as the Prince of Bo and the leader of the Night Demons. Eight years later, Zhaixing, who had experienced the Ma family tragedy, unexpectedly reunited with Prince of Bo. Zhaixing suspected that Prince of Bo was Langzai, but Prince of Bo denied it because he was unwilling to face the painful past. In order to use Ma Zhaixing and the Ma family army to deal with the Xi Kingdom, Chu Kui granted marriage to Prince of Bo and Zhaixing, and even made Zhaixing mistakenly believe that the enemy who killed her father was the Xi King. Zhaixing was misled by Chu Kui and agreed to marry Prince of Bo. During the days they spent together, Zhaixing's tenderness gradually awakened Prince of Bo's nature and love. Prince of Bo was moved by Zhaixing's intelligence and bravery. Zhaixing also found that although Prince of Bo was in a high position, he still retained the kindness and justice in his nature. When Prince Bo found out the truth about the pursuit eight years ago and learned that Zhaixing had never abandoned him, the love that had been suppressed for a long time broke through the disguise. Prince Bo finally admitted that he was Langzai, and he and Zhaixing resolved the misunderstanding on the Wolf Hunting Mountain and kissed each other to seal the relationship. In the end, after many hardships and tests, Zhaixing, with the help of the righteous men Ji Chong and Bao Na, found out that the mastermind of the Ma family tragedy was Chu Kui, so everyone worked together to overthrow the tyranny of the Yang Kingdom. However, Zhaixing was seriously injured while repelling the enemy, and a wisp of fragrant soul passed away. Prince Bo did not choose to live alone, and chose to go with her.