Is immortality possible and what is the price of the elixir of life? The eccentric Nestor leading a hermit's life, and the demonic Lysander, the ruler of the Viennese dungeons, are ready to sacrifice everything to achieve the main goal of alchemy - finding the philosopher's stone. But what if the key to eternal life involves incest? What if one's own immortality is based on an unnatural union?..Aura, the daughter of the alchemist Nestor, becomes a witness, if not a victim, of terrible events...