Watch Sadisflix. In the late 19th century Catholicism was gaining a foothold on Jeju island, much to the horror of the Confucian community, who were seeing their influence diminishing as well as getting increased taxes from Catholic-friendly government officers. The conflict became a religious war that resulted in a rebel Confucian army massacring hundreds of Christians in little more than a matter of days. The Uprising details the events leading up to the assault, focusing on the story of Yi Jae-su, the young man destined to become the leader of the rebel army.