Li Zhao, a modern researcher of ancient weapons, transmigrates overnight into the body of a princess sent away for a political marriage. At the palace banquet, when the Northern Di envoys push her too far, she tears up the marriage edict in front of everyone and declares, “My Great Yan soldiers are still alive. Why should a woman be traded for peace?”
Her defiance may have bolstered her country's prestige, but it leaves her in a desperate position. To escape a dead end, she points to the crippled general in a wheelchair: Pei Ji, heir to the Duke of Zhen, once hailed as the God of War, until a strange poison robbed him of his martial arts three years ago. “Him. I’ll marry him in three days.”
Everyone thinks she’s gone mad. On their wedding night, beneath the red candles, they strike a bargain: a marriage in name only, for three years, with neither interfering in the other’s affairs. He needs a “heir’s wife” to maintain appearances; she needs a place to shelter from a world in chaos.
Using her modern knowledge, she quietly expands trade routes and improves military weapons. Late at night, he plots in his study, his intelligence network gathering reports like falling snow. With the Northern Di at the border and calls for peace rising to a roar in court, she presents a revolutionary weapons design in the golden hall and argues for resistance. Then her silent husband suddenly speaks, exposing the hypocrisy of the peace faction in just a few words and stunning everyone with his sharpness.
That night, assassins burst through the window, swords aimed at her throat. In an instant, her husband springs from his wheelchair. His black robes stained with blood, he kills three men in a flash. Pinning her against the wall, he breathes hotly against her and says, “Your Highness, you’ve watched long enough… Now it’s time to pay for the show.”
Meanwhile, atop the palace’s innermost halls, the young emperor strokes the strange markings glowing brighter in his palm. His eyes are bloodshot as he murmurs, almost to himself, “System, this is the third time… If I kill her this time, can I really go home?”
A marriage that began as a transaction has already become real amid danger and devotion. And when the cold gaze from another world delivers its final killing move, no one can remain outside the game.