In AD 391,
Alexandria is part of the
Roman Empire, and Greek philosopher
Hypatia is a teacher at the
Platonic school, where future leaders are educated. Hypatia is the daughter of
Theon, the director of the
Musaeum of Alexandria. Hypatia, her father's
slave, Davus, and two of her pupils,
Orestes and
Synesius, are immersed in the changing political and social landscape. Orestes tries to woo Hypatia with music, but she rejects Orestes's love by showing him her menstrual rags, because she prefers to devote herself to science. Davus assists Hypatia in her classes and is interested in science. He is also secretly in love with her. Meanwhile, social unrest begins challenging the
Roman rule of the city as
Pagans and
Christians come into conflict. When the Christians start verbally insulting the statues of the pagan gods, the pagans, including Orestes and Theon, ambush the Christians. However, in the ensuing battle, the pagans unexpectedly find themselves outnumbered by a large Christian mob. Theon is gravely injured, and Hypatia and the pagans take refuge in the
Library of the Serapeum. The Christian siege of the library ends when an envoy of the Roman Emperor
Theodosius I declares that the pagans are pardoned, but the Christians shall be allowed to take possession of the library. Hypatia and the pagans flee while trying to save the most important
scrolls before the Christians overtake the library and destroy its contents. Davus chooses to join the Christian forces. He later returns with a
gladius and
sexually assaults Hypatia, but he begins to sob and offers his sword to her. However, she removes his slave collar and tells him that he is free. Several years later, Orestes, now converted to Christianity, is
prefect (Roman state official serving as governor) of Egypt. Hypatia continues to investigate the motions of the
Sun, the Moon, the five known "wanderers" (planets), and the stars. Some Christians ridicule the thinking that
the Earth is a sphere by arguing that people far from the top would fall off the Earth. When they ask Davus what his opinion is, he avoids conflict by saying that only God knows these things. Hypatia also investigates the
heliocentric model of the
Solar System proposed by
Aristarchus of Samos by having an object dropped from the mast of a moving ship, which demonstrates that a possible motion of the Earth would not affect the motion, relative to Earth, of a falling object on Earth. However, due to
religious objections against heliocentrism, the Christians have now forbidden Hypatia to teach at the school. The Christians and the
Jews come into violent conflict. The leader of the Christians,
Cyril, views Hypatia as having too much influence over Orestes and stages a public ceremony intended to force Orestes to subjugate her. Hypatia's former pupil, Synesius, now the
Bishop of
Cyrene, comes to her rescue as a religious authority counterweight but says he cannot help her unless she accepts Christianity; she refuses. Hypatia theorizes that the Earth orbits around the Sun in an
elliptical orbit, not a circular orbit, with the Sun at one of the
foci. Cyril convinces a mob of Christians that Hypatia is a
witch, and they vow to kill her. Davus tries to warn Hypatia, but she is captured. They strip Hypatia and are about to skin her alive until Davus persuades the mob otherwise, and they decide to
stone her instead. When the mob goes outside to collect stones, Davus suffocates her to spare her the pain of being stoned and tells the mob that she fainted. Davus leaves as they begin to stone her. ==Cast==