Gu Tangtang was abducted at the age of four, leaving her with the mental capacity of a child. After saving two yuan by collecting plastic bottles, she unexpectedly won an 80-million-yuan lottery prize. Holding a family portrait, she set out on a journey to find her family. Upon returning home, her eldest and third brothers only cared about profits and abused her in every way possible, while only her second sister, Gu He, disregarded the loss of family property and stubbornly protected her younger sister. After accidentally falling down the stairs, Tangtang completely recovered her memory, but she continued to play the fool while silently observing human nature. Lu Jingxing, who was kidnapped with her in their childhood, spent eighteen years searching for her bitterly with half a silver lock, and they reunited once again. Facing her greedy, blood-sucking biological brothers, Tangtang held tens of millions in prize money, protected her benefactor sister, severed hypocritical family ties, and headed towards a mutual, two-way devotion with her true love Lu Jingxing.