Wang Xiaoman, making a living among the common folk, saves someone at the vegetable market and unexpectedly rescues the wealthy Su Wanning. With multiple coincidences in blood type, birthday, and birthplace, a paternity test confirms that Xiaoman is Su Wanning's biological daughter. However, one after another, suspicious clues lead the Gu family's adopted daughter, Gu Mingzhu, to also start investigating her parentage. Layer by layer, clues uncover the mix-up from a rainy night at a hospital over twenty years ago, revealing that Gu Mingzhu is actually the daughter of Zhao Lanxiang. After weathering various storms, the two girls let go of their entanglements; Xiaoman sticks to her original aspirations to open a second-hand repair shop, and each walks toward her own destined life.