Final answer:
In this version, Iphigenia is sacrificed but mysteriously disappears, only to be transported to another country where she becomes a priestess. Her brother arrives and is also captured for sacrifice, but is saved when he reveals his identity.
Step-by-step explanation:
In the version mentioned, Iphigenia, who is Agamemnon's daughter, is sacrificed but then mysteriously disappears from the sight of those who sacrificed her. She is transported to another country where it is the custom to offer up all strangers to the goddess. She is appointed to this ministry and serves as a priestess. Later, her own brother arrives and is also captured for sacrifice, but he reveals his identity just in time and is saved from being sacrificed.