When spring comes, the people leave their winter cave, foraging for honey, grubs, and the hot richness of a deer’s brain. They awaken the fire to heat their naked bodies, lay down their thorn bushes, and share pictures in their minds. But strange things are happening: inexplicable scents and sounds. Imaginable beasts are half-glimpsed in the forest; upright creatures of bone-faces and deerskins. What the people do not know is that their day is already over.