The Return of the Amnesiac Heiress (Dubbed)

To afford her mother's medical expenses, Eun Seong turns to her estranged grandfather for help, only to be told she must sever ties with her mother in exchange, simply because her mother once eloped with an ordinary man. Twenty years after the separation, her mother becomes president of Cheonhae Group, determined to find her lost daughter. Meanwhile, Eun Seong, now suffering from amnesia, throws herself into a relationship with her secretly unfaithful boyfriend of five years.