The Kidnapping Day

Myeong-jun accepts his ex-wife Hye-eun's proposal to kidnap an 11-year-old girl named Ro-hee to pay for his daughter's hospital bills. En route to execute his plan, someone collapses before his car, which turns out to be Ro-hee. He takes her home, but she can't remember anything when she wakes up. Myeong-jun claims to be her dad and contacts her parents for the ransom, but they can't be reached.

Myeong-jun finds out that Ro-hee's parents have been murdered. He can no longer demand ransom or bring Ro-hee back to her home. As he heads to Ro-hee's home, a suspicious figure approaches Ro-hee who is home alone. Meanwhile, Sang-yun, the detective in charge of the case of the murdered hospital director and his wife, learns of their daughter's kidnapping and begins tracing Myeong-jun's footsteps.

Ro-hee finds out that Myeong-jun is not her dad but a kidnapper. Myeong-jun decides to take Ro-hee to the police station and turn himself in. Right then, Ro-hee regains a part of her memory and is left in shock. Meanwhile, Sang-yun discovers something about Myeong-jun's past.