When two people, David and Claire, leave a bus at the same stop, David follows Claire. She accuses him of stalking, only to embarrassingly discover that they live in the same home. Upon walking in and finding pictures of one another together they determine they know each other and simply have amnesia. In order to get their memories back David suggests the two have sex. It is soon realized that David and Claire do not have amnesia but are dating and are simply playing a game. One day, Claire suddenly disappears. After contacting her friends and workplace, David goes to the police. Detective Sloan can offer little hope beyond posting missing person flyers.