A hunter on the lookout, the dull roar of a deer, the mist engulfing the forest ... A vision for a haunting memory: a friend haunted by the stalking of a deer, entering the heart of the forest to disappear there Without leaving a trace. Shot under documentary conditions in the Cévennes, Le sang noir turns into a fantastic tale, to deepen a hunter's dizzying obsession for an invisible beast, forever stolen.