Zlata, the seventeen-year-old daughter of a Russian nobleman-industrialist, goes with her father to Syria, where after an attack by unknown people she disappears without a trace. The inconsolable father, confident that his daughter is dead, returns to his homeland. Zlata comes to her senses in the harem and learns that she was kidnapped by the confidants of the leader of a dark sect, who, according to prophecy, wants to conceive a demon - the Dark Lord - with the girl. The ritual is scheduled for the day of the solar eclipse. But the Muslim Amir, who is in love with her, decides to save Zlata...