Birth Secret

Jung Yi Hyun, a genius, tries to get her mother's money back from a scammer. Hong Kyung Doo, having the same motive, needs the money to save his mother's life. Yi Hyun meets her biological father. Ten years later, she wakes up on the sidewalk and is unable to recall her past memories...

Kyung Doo looks for missing Yi Hyun. Meanwhile, Yi Hyun traces her steps back and tries to remember everything...

Yi Hyun, unable to recall her past, returns to the Yega Group household, whose members believe she is putting on an act. Meanwhile, Kyung Doo continues his search for Yi Hyun.

Kyung Doo finds Yi Hyun but is shocked when she says she doesn't remember what happened between them.

Kyung Doo confronts Yi Hyun once more. Kyung Doo is scammed again. Things stir up in the Yega Group household...

Yi Hyun and Kyung Doo meet in Jeju Island. Yi Hyun gets closer to her daughter, Hae Deum, as she tries to remember her past...