 Agent Scully is spending Christmas with her family in San Diego. While there, she receives a mysterious phone call from a caller with the voice of her deceased sister, Melissa. Tracing the phone call leads her into the investigation of the death of a woman with a young daughter named Emily. Emily bears an uncanny resemblance to Scully s sister Melissa when she was the same age. This leads Scully to find out who Emily s natural mother is.