Ominous clouds are gathering over Persia. The good natured king Badiya is mortally ill and the demonic Grand Vizier Zaved holds his subjects in an iron grip, bringing the country to the edge of ruin. To make matters worse, a shadowy disease has appeared out of nowhere, spreading across the land. A young and talented apothecary Tara decides to find the cause of this plague and prevent it from spreading further.