Otkrytie, sluchayno sdelannoe professorom Mihailom Vladimirovichem Sveshnikovym v 1916 godu, vliyaet na sudbu kazhdogo, kto s nim soprikosnulsya, zatyagivaet v omut politicheskih intrig i drevnih mifov, daet shans izmenit hod istorii, stavit pered nevozmozhnym vyborom. V tretey knige romana «Istochnik schastya» Mihail Vladimirovich Sveshnikov i Fedor Agapkin - pridvornye vrachi krasnyh vozhdey. Pered nimi razvorachivaetsya taynaya mehanika sobytiy 1921 — 1924 gg. Ih patsienty - Lenin i Stalin. Vozhdi teshat sebya nadezhdoy poluchit lekarstvo ot starosti i smerti. Proshloe perepletaetsya s nastoyaschim, realnost okazyvaetsya himeroy, drevnie mify — realnostyu. Milliarder Petr Borisovich Kolt gotov na vse, lish by dobyt zavetnyy preparat. Biolog Sonya Lukyanova dolzhna razgadat taynu otkrytiya svoego prapradeda. TSel blizka, razgadka pochti naydena. Ostaetsya lish zaglyanut v glaza bezdne.
