Orphan revolves around the life of the family of John and Kate couples. Because of miscarriage, Kate and John, especially Kate becomes depressed and obsessed with terrible nightmares. With the efforts to find a normal life, they decide to adopt. At the local orphanage, both John and Kate are attracted by Esther. However, as soon as Esther comes to their home, a series of strange events occur, causing Kate to believe that there’s something wrong with Esther, that she is not as simple as what she represents.