By the will of the Polish king Stefan Batory, the immortal vampire and skilled alchemist Saint-Germain goes to Moscow in order to appease the Russian sovereign with the help of the precious stones he created and achieve a peaceful union. But turmoil is coming in Russia. Tsar Ivan is old and weak, and the heir to the throne, Tsarevich Fyodor, is not capable of governing the state. Unexpectedly, Saint-Germain finds himself drawn into the cunning intrigues of courtiers who are trying to get to the heights of power at any cost.