Alexandria in Egypt 48 BC. The country is divided by civil war pitting Cleopatra's supporters against those of her brother and husband, Ptolemy, who is ravaging the country. In this climate of terror, Thomas, a young apprentice to Akkad, Cleopatra's astrologist and astronomer, falls in love with his master's daughter. One day, in horror, he discovers that both Master and daughter have been kidnapped.

Thomas sets out on their trail and learns in the course of his investigations that Cleopatra herself had asked Akkad to make a specific divination, and that the partisans of Ptolemy are behind the kidnapping. Cleopatra promises Thomas that in exchange for the tablets required for the divination, her guards will find the master and his daughter. 

Thomas's investigations lead him to the discovery of Egypt's legendary sites such as the Library of Alexandria and the Lighthouse. Thomas also meets the Queen and a whole host of other mysterious characters.

Will he manage to save his master and his loved one, so that together they can decipher the stars? Without the prophecy, the country will be lost: the destiny of Egypt and its Queen are in his hands.