The female protagonist transmigrates across time in a single day. Although her initial situation is difficult, during her flight she accidentally gets caught up in imperial court turmoil and makes the acquaintance of the national preceptor, who is viewed by the world as compassionate and benevolent, and possesses profound strategic acumen. The two become bound by a national treasure, turning into a bickering couple who journey together while exchanging witty banter. Relying on her cleverness and ingenuity, the female protagonist helps him prepare equipment and supplies, and together they join forces to defuse layer upon layer of crises.