Beth and her college roommate have just arrived at her home in Florida. Beth stands frozen when her father walks into the room because he isn't her father! The parents explain that she suffers from amnesia. The roommate is not convinced. Then a rock flies through the window and Beth and her roommate race for the door, only to be stopped by an armed man. Held at gunpoint, they realize the truth and make a decision which leads to an exciting climax. One int. set.