The Sisters may be found anywhere from street corners, where they offer to tell ones future for a few pennies, to those who appear to be working for the service of a lord. It is said that they go where they will, when they will they work for who they choose, not for who chooses them.
A great treasure has been stolen from the Palace and taken to the nearby Temple to the Bitch-Goddess Atrath Klee. The King demands that the party go and retrieve it - the only snag is that the Temple is guarded by potent magic that will kill any male who steps inside. It's just as well that the King has a stash of Girdles of Gender Alteration for just this circumstance.