At the beginning of the second act Idomeneo is in conversation with Arbace. He communicates to him his fearful vow, from the fulfilment of which he wishes to escape. Arbace represents to him that this is impossible. But when he hears that Idamante is to be the sacrifice, he counsels his being sent to a distant country, and that during his banishment they should seek to appease the wrath of Neptune. Idomeneo decides upon commanding Idamante to accompany Electra to Argos, and there ascend the throne, and commissions Arbace to bid him prepare for the journey. Arbace promises obedience (aria, 11), and departs. Ilia now appears, expresses delight at Idomeneo's safety, and, while extolling Idamante's goodness, declares her own gratitude and submission (aria, 12). Her warmth causes Idomeneo to suspect their love, and his grief and confusion are thereby augmented (aria, 13). Electra, entering, thanks him for his care. He leaves her alone, and she expresses her joy at the fulfilment of her dearest wishes (aria, 14). The warriors assemble in the harbour to the sound of a march (15). Electra appears with her followers, the sea is calm, and all look forward to a fortunate voyage (chorus, 16). Idomeneo dismisses Idamante, who sees in this command a fresh proof of his father's inexplicable displeasure. They express their opposing sentiments in a terzet (17). As they prepare to embark, a terrific storm arises, and a huge sea-monster rises from the waves. This convinces Idomeneo that his {IDOMENEO--PLOT.} (129) disobedience has offended Neptune, and he determines to die himself, and not to sacrifice the innocent. "The storm continues to rage, the Cretans fly, and the act closes with the expression of their fear and horror by singing and pantomimic dancing."