A terrible plague is rising from the depths of the Indian Ocean, threatening to destroy humanity. The nature of this deadly disease is unknown, its spread cannot be stopped. Two scientists from the secret squad "Sigma" - Lisa Cummings and Monk Kokkalis - were sent to Indonesia to find out the causes of the sinister epidemic.Somehow, in the Secret Archive of the Vatican, the sign of the Order of the Dragon - a terrible sect appears on the floor , recently destroyed by Sigma. An inscription is carved under the sign, made in the oldest language on earth - the language of angels. The keeper of the archive understands that this inscription may contain a means of saving humanity.Another bestseller from the author of the novels "Pyramid", "Amazonia" and "The Black Order".