Jiang Chiyue, captain of the 22nd-century Huaxia Special Abilities Task Force, falls during a doomsday mission and transmigrates into a princess of Great Xia, ordered to assassinate Tuoba Chu, the God of War of Ancient Liaowei, under the guise of a political marriage. On their wedding night, she rides into the city on Tuoba Chu's shoulders, each hiding a dagger and gripping a hidden weapon, testing each other with murderous intent. After entering the estate, she befriends her frail and kind-hearted mother-in-law Chu Mengxin, Tuoba Rui who looks identical to her sister from a past life, and the enigmatic Yuyao. Using her dual metal and water abilities to purify water sources, farm vegetables, and grow herbs, she steps by step improves this impoverished household, going from selling vegetables and making money to discovering iron and coal mines.