Night Slaves

Clay and Marjorie, an estranged married couple, take a vacation together while Clay recuperates from a serious auto accident. They end up in a sleepy little town which seems to be normal, except at night when the townspeople begin acting strangely and leave town in trucks, always returning by morning. Marjorie also begins to act strangely, and no one has any memories of their nighttime activities. Only Clay is unaffected due to the presence of a metal plate in his head, and no one believes his story.