On her wedding day, Lin Zhi’s parents suffer a tragic car accident, desperately needing $50,000 for emergency surgery. Forced to beg her groom, Shen Yanci, for a last-minute dowry increase, Lin Zhi gets the money—but Yanci marks her as a greedy gold-digger. On their wedding night, Yanci strips off his gentle mask, subjecting her to ruthless humiliation. He institutes a sadistic rule: all living and medical expenses for her and their child must be drawn from a customized mystery box machine, giving her only whatever amount she draws.
Lin Zhi's life turns into a horrific gamble. Sick with a fever, she draws "Better Luck Next Time." Giving birth to her daughter Xiaoman, she draws only $9.90, which is all Yanci pays. When Xiaoman suffers a life-threatening high-fever seizure, Yanci cold-heartedly hands her the machine to draw the ICU deposit. Drawing a mere $9.90 again, a heartbroken Lin Zhi takes the money and flees into the pouring rain with her child.
At the hospital, Yanci’s scheming secretary, Xue Man, attempts to harm Xiaoman to coerce Lin Zhi into signing away her parental rights. After signing, Lin Zhi vanishes completely. Searching for her, Yanci finally uncovers the truth behind the wedding dowry, exposing how his mother and Xue Man falsified medical bills and framed Lin Zhi. With both conspirators arrested and his company ruined, Yanci is consumed by agonizing remorse.
With help from gentle pediatrician Lu Chengyan, Lin Zhi restarts her creative career, achieving massive success. A year later, as Yanci tries to make amends through child healthcare charities, he witnesses Lin Zhi living a peaceful life with Chengyan and her walking toddler. Realizing it is too late, Yanci finally lets go. Embracing the sunlight, Lin Zhi leaves her painful past behind, stepping into a bright new future alongside Chengyan.