A husband and wife are driving home from delivering their foster son back into care. Only the woman speaks during the portion of the journey that the audience witnesses. It becomes clear that their foster son was caught joyriding and subsequently made allegations of sexual abuse against his foster father. The wife assures her husband that she knows he is innocent, that the allegations are false and that it will be only a matter of time before the incident is over. Her husband remains silent.

Autobahn is contained in the collection of short plays by the same name by Neil LaBute.