Six years ago, heiress Madelynn publicly dumped poor student Kristopher. After her family fell, she married an abusive gambler and gave birth to Emily, who has congenital heart disease.
Years later, Madelynn works under an alias to fund Emily's surgery and crosses paths with Kristopher, now a powerful CEO. He acts cold but secretly protects her from her husband.
Yet Madelynn not only suffers her coworker's sabotage, but also becomes a romantic rival in Izabella's eyes. The jealous socialite keeps framing Madelynn and even tampers with the DNA test Kristopher's grandmother got for Emily. But Madelynn fights back with wit and evidence.
Emily draws Madelynn and Kristopher closer. However, the truth about her bloodline stays hidden, and Izabella keeps plotting in the shadows...
