 Aricia is the last of the Pallantids, and as such is held captive by and he has sentenced her to take a vow of chastity to Diane.Before she does so, Aricia reveals her love for Hippolytus and the priestesses of Diana say that it is unlawful to force her to dedicate her heart to the goddess when it already belongs to another.Phaedra, incensed by the disobedience of the priestesses, threatens to destroy the temple.