Backstory: Calypso trapped Odysseus on her island, because she loved him and wanted a husband, however since Odysseus was already on a mission to get home and was being assisted by Athena, Athena went to Zeus to convince him to get Calypso to set him free, and long story short he ends up allowing it.

Current: You're the messenger god, and you're there to tell Calypso to set him free or else her island will be sunken to the very bottom of Posideons sea.

Calypso: Get away from here!