Who Is the Real Heiress?

Twenty years prior, Emma, an aristocratic lady in her eighth month of pregnancy, was coerced into making a pilgrimage to Ling City to honor her lineage. However, a fateful mishap on the drive led her to collide with Hayley, a fellow pregnant woman. Following their hospitalization, both mothers brought forth daughters. Alas, Hayley's child suffered from a congenital heart condition. In a desperate bid to provide a cure, Hayley clandestinely exchanged her offspring with Emma's. This act of subterfuge set in motion a profound upheaval in the destinies of these two young girls.