Rural girl Su Wanqiao senses that the Yunqiling Dam is about to collapse, risking her life to report the news and save Meng Zhenbang and his daughter. The unique begonia birthmark on her lower arm makes Meng Zhenbang suspect she is his biological daughter lost for twenty-one years. Su Wanqiao refuses a heavy financial reward and enters to work at the Yunyan Restaurant under the Meng Group by her own ability, yet is repeatedly framed by Meng Xingyao, whose identity was swapped, and the servant Zhou Ma. Having gone through crises such as the replacement of appraisal samples and cold storage harm, the old truth of the baby switch is gradually unveiled.