In a doctor's office, a man and a woman sit stunned as the doctor speaks: Blood tests show without a shadow of a doubt that the son they love so dearly, and who is now dying, is not their child. Incredible as it seems, there must have been a mix-up in the hospital where he was born. Enduring the pain of Peter's death is a blow they must bear, but Margaret and Arthur Crawfield must also confront the realization that somewhere their biological child...