On a deserted late-night train, a man cannot take his eyes off the tipsy beauty sitting across from him. When a glimpse of her panties shows beneath her skirt as she sleeps, he gets hard. She wakes and catches him staring, making things awkward—then lifts her skirt again as if asking whether her panties turned him on. Alone in the empty car, the two strangers have sex as wet slapping sounds and muffled moans echo through the train.