In the war between Egypt and Ethiopia, Aida is held captive as a slave of the Egyptian princess Amneris. No one knows, however, that she is actually the daughter of the Ethiopian king, Amonasro. Aida has fallen in love with Radamès, who returns her affection, to the great chagrin of Amneris, who wants Radamès for herself. Radamès is made commander of the Egyptian army, putting Aida in a terrible position: a victory for Radamès could mean marriage and freedom for her, but defeat for her father and homeland. When Radamès returns victorious, he is unaware he has captured Aida’s father. Amonasro forces Aida to coax Radamès into revealing military secrets, for which he is sentenced to death for high treason. Amneris offers to lift the sentence if Radames forswears Aida and agrees to marry her instead. He refuses, and is condemned to be buried alive. Aida secretly joins him in the tomb, and they face death together.