When a gas cylinder blows up, modern elite accountant Zhao Xi and her clear and foolish college student younger brother Zhao Shi time-travel together. He becomes a puppet tyrant at risk of assassination at any moment, while she becomes a grassland peace-marriage princess. The siblings bind to the Deep Sibling Affection System to save up one hundred thousand points to return to the modern era, launching an extreme survival mode. Because their points hit rock bottom, Zhao Xi frantically buys flawed special-offer cards from the mall, allowing the elder sister to enjoy max-level martial arts while the unlucky younger brother is forced to bear all the social death side effects. However, that upright and pure Imperial Guard Commander Li Yu—why is the way he looks at her getting weirder and weirder?