Based on Kim Jee-Woon’s 2003 Korean horror film, "Changhwa Hongryon," "The Uninvited" revolves around Anna, who returns home after spending time in the hospital following the tragic death of her mother.  Her recovery suffers a setback when she discovers her father has become engaged to her mother's former nurse, Rachel. That night, Anna is visited by her mother's ghost, who warns her of Rachel's intentions. Together, Anna and her sister try to convince their father that his current fiancée is not who she pretends to be, and what should have been a happy family reunion becomes a lethal battle of wills between stepdaughters and stepmother.