On the day of her grand wedding, bride Shen Qingyue is stood up by her fiancé Xu Zhaoye, who rushes off to accompany his sick female best friend. Heartbroken, Shen Qingyue dials the phone of business archenemy Li Sinian, flash-marrying him on the spot. The temporarily cobbled-together couple moves from a contract to true feelings, the old flame returns to meddle, and the best friend's schemes and plots gradually surface, while also uncovering Li Sinian's secret unrequited love hidden for many years. Shaking off the emotional pain of the past, can they truly race toward a mutual love?