Flash Marriage with Twins

Jin Wanning and Li Sinian accidentally sleep together and, after becoming pregnant, give birth to twins, a boy and a girl. However, her brother-in-law sells the baby boy and deceives Jin Wanning into believing she only gave birth to a daughter. The baby boy is eventually found by Li Sinian, who has been searching for years for his son's biological mother, but to no avail. Years later, with the help of his son, Li Sinian and Jin Wanning become a couple under a marriage agreement.