Ji Yuntang, a doctor from the 24th century, travels through time and returns to the Marquis's residence, where she is forced to marry the paralyzed Prince of the Night in place of the fake heiress. Relying on her spatial dimension, medical skills, and advanced weapons, she treats the prince and punishes everyone who makes trouble for them. When the foolish emperor repeatedly suppresses their household, she simply empties the imperial treasury. After the prince recovers, he becomes exceptionally handsome and indulges his wife in everything. Together, they plot to overthrow the emperor and ultimately claim an empire stretching across thousands of miles.