Two friends on a fishing trip pick up a stranded motorist who turns out to be a psychotic escaped convict. This sociopath has already murdered other good Samaritans in his efforts to evade authorities. He sadistically taunts and threatens the two men and perversely delights in telling them that he has them both marked for death sometime before the end of the trip. His destination is a ferryboat in Baja, California, which he hopes will help him get to the mainland. The hostages hope to stay alive long enough to escape or be rescued by Mexican authorities
Harry and Eve Graham are trying to adopt a baby. The head of the agency senses Harry is keeping a secret and does some investigating. He soon discovers Harry has done an unusual amount of traveling from his home in San Francisco to Los Angeles. Harry gets tracked down in LA where he has a second wife and a baby. Via flashbacks, Harry tells the adoption agent how he ended up in two marriages.