Was everything fake..?

A young father, 38, with a 17-year-old daughter. However, he loses his own daughter in an incident and encounters Yeo-ju, a girl lying bleeding on the street. The story begins with the father's secret and Yeo-ju's fake daughter intersecting and clashing. It could be predictable, or it could be mysterious. Yeo-ju and Seok-jin. Was everything fake?