- 1871 - Grand opéra Prayers are said on the eve of Amneris and Radames' wedding in the Temple of Isis. Outside, Aida waits to meet with Radames as they had planned.
Amonasro appears and forces Aida to agree to find out the location of the Egyptian army from Radames. When he arrives, Amonasro hides behind a rock and listens to their conversation.
Radames affirms that Aida is the person he will marry, and Aida convinces him to flee to the desert with her.
In order to make their escape easier, Radames proposes that they use a safe route without any fear of discovery and he also reveals the location where his army has chosen to attack. Upon hearing this, Amonasro comes out of hiding and reveals his identity. Radames feels dishonored. At the same time Amneris and Ramfis leave the temple and, seeing Radames with their enemy, call the guards. Amonasro and Aida try to convince Radames to escape with them, but he refuses and surrenders to the imperial guards.