Mary Bai has always been unlucky, stumbling through life and facing constant mishaps. Living with her grandfather and depending on their small guesthouse for survival, she endures her stepmother and stepsister's scorn. When her grandfather falls ill and plans to leave the guesthouse to her, the family objects, leading to a will stipulating that if Mary Bai isn’t married by 24, the guesthouse will go to her uncle. To protect the guesthouse, Mary Bai embarks on a quest to find a husband, but her bad luck continues until, on her 24th birthday, she accidentally enters into a contract marriage with Jay Wen, changing her life forever.
