Poor female worker Megan Hayes signed a secret marriage agreement with the richest man Graham Everly due to her special physical condition. Megan concealed her pregnancy while working and suffered bullying, but Graham fully defended her after learning about it. As their relationship deepened, Megan's true identity was revealed - she was actually the long lost biological daughter of another wealthy family. The person who ultimately committed evil was punished, and the two of them welcomed a happy ending.