In distant Paris, the magician and eternal wanderer Count Saint-Germain shows his patrons, Louis XV and the Marquise of Pompadour, an amazing stone - the Derianur diamond, the “Sea of Light”, which once adorned the forehead of the Indian goddess Tara. Now the stone is looking for a new owner. The one who receives it will gain unprecedented power and stand at the head of a rising empire. Saint-Germain goes to Russia, where he must meet with the contender for the throne - Grand Duchess Ekaterina Alekseevna. The brotherhood of initiates is ready to assist the future empress in seizing power, but wants to receive guarantees of future reforms. Catherine makes a promise... “The Stone of Power” is the first novel in a series dedicated to the early life of Catherine the Great.