This magnificent film is a portrayal of that period when Ninus was king of Babylon. This is the king who, in order to gratify his desire for luxury and elegance, built the "Hanging Gardens." Semiramis, when first King Ninus was her, was a woman of low estate, living in the country, but her beauty so appealed to the king that he made her his wife. Shortly after, thirsting for power, Semiramis plots the death of her husband, and Ninus is assassinated. The people of Babylon are horror struck at the death of their king, and clamor wildly outside the palace gates for the life of the regicide, but Semiramis, by her audacity and exceeding great beauty quells the clamoring mob when appearing in their midst. Semiramis later wins the esteem of her subjects by personally taking the field with her army and repulsing the invasion of the Arabs. This victory was celebrated with great feasting and merry-making in the Hanging Gardens. Finally, after a glorious reign, Semiramis, according to the legend, ascended to heaven on a cloud and immediately after her death the walls of Babylon fell before the invaders from Arabia.