You have entered the Rhudauran Lost Temple in an attempt to cleanse the evil from the corrupted cup that came to you out of Mordor.
There must be some way to get into the innermost chamber of the Lost Temple, where Elrond believes the corrupted cup might be redeemed.
Fithákh, a cultist of the Corcur, has gained entrance to the innermost chamber of the Lost Temple. She seems to be expecting someone.
Fithákh asked you to set the cup on the tomb in the middle of the inner chamber, saying that it will serve as an altar for a sacrifice.
You have done what you set out to do, and now you can either leave the chamber with haste or put an end to Fithákh's villainy.