Adapted from a novel, Eight Days Mystery of Jeongjo Assassination is a high-budget, 10-episode epic that weaves a rich narrative fabric around the life of one of Korea's most fascinating historical figure: 18th-century ruler, King Jeongjo, who has also been portrayed in dramas such as King of the Wind and Conspiracy in the Court. A strong willed and a brilliant ruler, Jeongjo (Kim Sang Joon) instituted governmental reforms, which quickly generated hatred from many powerful men.