Mitridate, re di Ponto

King Mitridate has left his empire in the care of his sons Sifare and Farnace while he is away at war. Deceived by a rumour of his father's death, Farnace declares his love to the King's betrothed, Aspasia. She seeks the protection of Sifare. Mitridate returns with Ismene as a bride for Farnace.