Kim Myung-Joon (Yoon Kye-Sang) is a poor man with a kind heart. He desperately needs money to pay for his sick daughter’s surgery. Just then, his ex-wife Seo Hye Eun (Kim Shin Rok) shows up and offers to kidnap 11-year-old Choi Ro Hee (Yuna), whose parents are wealthy. Kim Myung-Joon is so desperate that he accepts her offer. While planning the kidnapping, Kim Myung-Joon is lurking near Choi Ro-Hee’s house when he accidentally hits someone with his car. The person he hits is Choi Ro-Hee. She loses her memory as a result of the car accident. Kim Myung-Joon takes Choi Ro-Hee to his home and begins living with her. Choi Ro-Hee believes Kim Myung-Joon is her father. She is an extremely intelligent girl. Meanwhile, Kim Myung-Joon wants to return Choi Ro-Hee to her parents, but they do not answer the phone. He decides to go to their house to find out why. There, Kim Myung-Joon witnesses his parents’ bodies being removed from their home. To make matters worse, Choi Ro-Hee realizes that Kim Myung-Joon is not her father and is lying about their relationship. Park Sang Yoon (Park Sung-Hoon) is the detective assigned to track down Kim Myung-Joon, who is suspected of murder.