The predators and prey in Nocturne cavort and carouse in a blue-tinged world under the dim light of a midnight moon, making light and chasing light and lurking in the shadows. The four-minute film intercuts between various beasties, animal and mechanical, that pass through a forest one night: a firefly, a frog, an owl with twin searchlights for eyes, a cat with glowing diamond orbs and a car cutting through the dim forest murmur with its engine a-roar and headlights blazing.