Imagine the scene. You receive a DVD in the post. You do not know who it is from. You put it into your player and settle down to see what it is about. Your partner is in the shot. They're tied to what appears to be a dentist chair in the middle of an abandoned looking warehouse. They look scared. They tell you they love you and the screen goes dark. The words appear stating that you can report your partner as missing and her captors will kill her...