It is Achilles’ mother, the sea nymph Thetis, who inadvertently causes him to change his mind. She tells him that his fate lies in his hands. He can fight and become a hero who will be remembered forever but die young, or he can live a long life, surrounded by his loved ones, and be consigned to oblivion. Achilles does not hesitate and goes off to join the Greek forces. Meanwhile, the seer Calchas reveals that, offended by Agamemnon, the goddess Artemis is preventing ships from leaving port. Agamemnon agrees to sacrifice his daughter Iphigenia so he can assemble the largest fleet ever in order to attack Troy.