The Zhao family, which values sons over daughters, had two daughters in law giving birth at the same time. Qin Sunan, the youngest daughter-in-law whose husband passed away unexpectedly, gave birth to a daughter and was thrown into the river by the superstitious mother-in-law Zhou Lanzhi under the pretext of treatment. The child survived and was picked up and rescued by Zhang San, a scavenger with only eight years of intelligence. Zhou Lanzhi intercepted her but failed, deceiving Qin Su by claiming that the child had been taken away by human traffickers. Fifteen years later, Zhang Ping'an, a highly talented dancer, was escorted by Zhang San to attend an important dance competition at school. On the way, she missed her wealthy mother Qin Su who was about to go to her house to search for her. However, the wicked mother-in-law Zhou Lanzhi intercepted Zhang San and Zhang Ping'an's father and daughter halfway because her grandson was seriously ill and needed a kidney transplant. She threatened Zhang Ping'an to donate a kidney to her cousin, while Zhang San was seriously injured to protect his daughter. At a critical moment, Qin Su rushed to save the father and daughter. When Zhou Lanzhi was dragged away, she accused Zhang San of being the human trafficker who stole the child back then. Qin Su, who had been searching for her daughter for fifteen years, hated Zhang San because of this. She used strong measures to bring Zhang Ping'an home to sue Zhang San, but Zhang San was released due to insufficient evidence. The father and daughter agreed to meet at a dance competition over the phone, but Zhang San, who was determined to buy a new dress for her daughter, almost drowned in a well to make money. Later, she became involved in a case of assaulting a girl and was mistakenly identified as a rapist by the girl. Zhang San overcame all obstacles and rushed to the competition venue