Immortality is the eternal dream of humanity. Paracelsus, a physician and alchemist of the Renaissance, came closest to solving the mystery of life extension. And today he has followers... Anesthesiologist Agniya Smolskaya plunged headlong into pleasant chores: she is marrying her colleague, surgeon Oleg Shilov! The joy is overshadowed by Oleg's work troubles: he successfully performed the operation, but the patient still died of sudden gangrene. And soon his body disappeared from the hospital without a trace! However, Shilov managed to discover something interesting: according to the documents, the man was much older than he actually was. Has someone really discovered a vaccine for eternal youth and is conducting dangerous experiments with it?..