Nisia dances and soon captivates the amorous king. He tries to embrace her, but she eludes him. Meanwhile, Pythia watches behind a curtain and points to the poisoned cup. Nisia takes it and presents it to Candaules with averted eyes. The King drains the cup. He feels the effects of the poison and strikes a gong, but Pythia appears. As Candaules writhes in the throes of death, Gyges and his courtiers rush in. Gyges goes to help the King, but Pythia forces him to confess that Gyges is the rightful monarch. Gyges takes the King's crown and presents it to Nisia who, surprised, looks at Pythia, who reminds her of her prediction.