While Artemis Fowl was saving demons on Hybras, life at home went on as usual. Upon his return, the young genius discovered that during his three years of absence he had acquired two twin brothers. The parents are happy to have their son again, but the family idyll does not last long: Artemis’s mother becomes seriously ill. It turns out that this is a rare case of enchantment - a terrible disease that several years ago almost destroyed the entire fairy people. But for a person to become infected with enchantment is simply unheard of! After all, the disease is transmitted through magic. Probably, the deadly virus has mutated, and if it is not stopped now, danger threatens not only the fairy people, but all of humanity. And to do this, you just need to go back in time and revive an extinct species of lemurs that have healing properties. But who said Artemis Fowl couldn't handle it? In the end, the life of his mother is at stake, who has no more than a day to live...