Based on the novel "Poison Genius Consort" by Jie Mo, Legend of Yun Xi is the tale of Han Yunxi. A smart girl who has expertise in medicine and is adept with poisons. She marries Long Feiye following the Royal decree of the emperor. Long Feiye is half brother to the Emperor and is the Prince of Qin. He is known for his inimitable KungFu skills. This Royal marriage however isn't that simple, the plot has a whole lot of amusing twists and turns.