Antigone was one of Oedipus' four children. She had two brothers, Eteocles and Polynices, as well as a sister, Ismene. One day, her sister informed her that her two brothers, who were heirs to the throne of Thebes, were fighting each other for power. They had agreed to take power alternately, but when the time came for Eteocles to hand his crown over to Polynices, he refused. An war ensued.