Kim Bo-Min

Thrown straight into a dangerous mission with none of his memories intact, a man must escape death while trying to figure out who he is, how he ended up here, and who is the mysterious voice in his ear calling him "Carter"? - IMDB

Man Sik is a single father who raises his 7-year-old daughter Ye Na alone. He has yet to register her birth because he wants her birth certificate to be the same as the other kids, which is to have a mother and father. In order to do so, he offers a deal to a woman from Vietnam: he will pay her 20 million won to put her name on a marriage certificate as his wife and Ye Na's birth certificate as her mother. She declines the offer and Man Sik becomes devastated. Mi Hee then appears.

A family moves to a quiet and isolated place, but suffers from nightmares on their very first day in the new home. The wife is anxious about a strange sound she hears in the warehouse, but her husband ignores her concern. Meanwhile, the family's nightmares are getting worse, to the point that they can hardly tell the difference between dream and reality. (imdb)