Sin Do-yeong and Yun Sa-wol are adoptive sisters who grew up together since childhood. Through elder sister Do-yeong's machination, Sa-wol lost everything and was raised in an orphanage. Meanwhile, Do-yeong, who harbored the secret of her birth, grew up with everyone's blessings and became a well-known news anchor at a famous South Korean TV station.
They say that those who receive love radiate a kind of light, like a tree grown under ample sunlight, exuding confidence and strength. Thus, they possess a strong immunity to face sadness and despair. However, in this world, jealousy and conspiracy also sprout and grow in the dark.