Su Wen, the top scholar of the civil examinations, is actually a reclusive Sword Immortal. To repay General Qiao for saving his life, he enters the imperial palace to investigate a case, but an unexpected twist makes him Princess Wang Xinyao's consort. Together, they fight off invading Beirong forces and foil Chancellor Qin's rebellion, gradually uncovering the truth behind General Qiao's murder. To their shock, the mastermind turns out to be the emperor, who has been pretending to be paralyzed. In the end, the emperor faces heavenly retribution and is brought to justice, the Great Qian Empire returns to peace, and Su Wen and the princess finally find happiness together.