When Prince Ning Xuanzhou became a hostage in a rival country, he found himself forcefully rooming with Master Hua on the very first day. However, Hua Xiyu, who had been disguising herself as a man since childhood, mistakenly believed that Ning Xuanzhou, the secret spy leader, was a princess. Their fake friendship blossomed into a real romance. As for the villainous forces that sought to ignite a war between the two countries and tear them apart, they were joyfully defeated by the couple working hand in hand.
The story is adapted from Pu Songling's original book Liao Zhai's Strange Stories. The story is about the murder of a number of men in Jinning City. As the mystery unfolds, the legendary banshee turns to be the work of a female demon. The demon-hunter Gu Shijie battles with the demons and the heroes in a battle of wits.