Plot synopsis: Nocturne is a taut chamber drama, set in a musty suburban estate to which a pretty but drab-looking woman returns upon the death of her mother, who in flashback we discover was a fiercely proper and dominating woman. Eichhorn's depressed reveries are abruptly interrupted with the unexpected arrival of a pair of hitchhikers, amoral, free-spirited young lesbian lovers seeking shelter from the rain.