Both take place in Goryeo and have a love story. Hong Jong Hyun plays a main charater in both. In SHR, he plays an evil brother plotting to take the throne. TKL, he plays Crown Prince's best friend. The locations in both shows are extremely beautiful. Lee Joon Gi and Siwan's characters fall in love with the female leads who care for them. Lee Ji Eun (IU) and Yoona's characters go through many hardships.