Seth Thornton caused the death of a race that existed in the shadow of humanity for several millennia. Maria Voronova is one of the few who managed to survive. He wants to achieve his redemption and live the life of an ordinary man, but to do this he will have to plunge headlong into the dangerous secrets of the race he destroyed. She wants to save the life of the one she loves, and for this she is ready to do anything. Seduction, betrayal, murder, inhumane experiments for the sake of creating a universal cure for any disease... A medicine or biological weapon of unprecedented power that can change the World forever?.. 18+ The world of “Zero Factor” is a world of alternative development and history of our reality. The first novel in the “Sacrifice” series is an independent work with a logically completed plot of intrigue and closed lines of the main characters. Currently, work is underway on the second and third books.