Death row inmate Lu Liyou was selected by the Imperial Intelligence Bureau. Western Xia ruler Lila Lancaster defeated the Song Dynasty army. The imperial court plans to send undercover agents. Due to a traitor, most spies were exposed. Lu Liyou became the perfect candidate. With Imperial Scholar Lin Jingmo, he took three life-or-death assessments. Lu Liyou decides to go undercover in Western Xia.