Young and successful, all Samantha (Heather Graham) and Craig (James Purefoy) want is a baby and their life together will be complete. Unable to make it happen, in desperation the couple turn to a high-tech fertility clinic for help and it's not long before Samantha is expecting twins. But as the months pass, the mother-to-be is increasingly haunted by the menacing presence of a hooded stranger. Following her wherever she goes, the stranger foretells of terrible things to come. Samantha fears the worst for her unborn children as she finds herself drawn into a living hell... from which there may be no escape.