Brian Kessler is a graduate student and journalist whose article about serial killers has gotten him an offer for a book deal from a publisher. He and his girlfriend Carrie Laughlin, an avant garde photographer, decide to relocate to California in hopes of enriching their careers. The two plot their journey from Louisville, Kentucky to Los Angeles, planning to visit infamous murder sites along the way which Carrie can photograph for Brian's book. Short on funds, Brian posts a Carpool ad on the university campus.