Based on true historic event called 'Im-o-hwa-byeon' in 1762, which King Yeongjo decreeing Crown prince to climb into and be sealed within a large wooden rice chest. Crown prince died eight days later. History indicates Sado suffered from mental illness; accused of randomly killing people in the palace and being a serial rapist. By court rules King Yeongjo could not kill his son by his own hands. As a result, Yeongjo, with the consent of Sado's mother, Lady Yi, issued a royal decree that ordered Sado climb into and be sealed within a large wooden rice chest on a hot July day in 1762. After eight days, Sado died. Sado was buried on Mt BaebongSan in Yangju. In 1789, his body was moved by his son King Jeongjo, to its current location, then called Hyeollyungwonnear Suwon, 30 kilometers south of Seoul. Five years later, the Suwon Hwaseong Fortress was built by King Jeongjo, specifically to memorialize and honor his father's tomb (the construction lasted 1794-1796, while the official reception was 1795). In 1816, Lady Hyegyeong died and was buried with her husband. In 1899, Prince Sado and Lady Hyegyeong were posthumously elevated in status and given the titles Emperor Yangjo and Empress Heonyeong. Their tomb was upgraded accordingly and renamed Yungneung. However, despite the story told in History classes and in the film, during the 19th century, there were rumors that Sado was not mentally ill, but had been framed; however, these rumors are contradicted by his wife, Lady Hyegyeong, in The Memoirs of Lady Hyegyeong. Sado's death remains an issue of debate as to whether his death was a retribution for his actual misconduct or if he was the victim of a conspiracy by his political opponents.
Simon says The Throne receives: