When two people, David and Claire, leave a bus at the same stop, David follows Claire. She accuses him of stalking her. It is soon revealed that they are role playing and that they live together as boyfriend and girlfriend. One day, Claire suddenly disappears. After contacting her friends and workplace, David goes to the police. Detective Sloane can offer little hope beyond posting missing person flyers.

A year later, Claire's friend Buck shows up. While they are out discussing Claire, David drunkenly insists Buck dare him to jump from a ledge. The next morning, Buck says he must make a flight that afternoon, and David allows Buck to stay at his apartment while he runs errands. Instead, David rides the bus through the city, reminiscing about Claire. The bus driver forces him off the bus at the last stop, and David returns home early.