While on a visit to the local museum one of the students accidentally breaks an ancient seal buried with an Inca Mummy. Without the seal to hold her, the mummy rises and must consume the life force of the living in order to stay alive and she assumes the identity of Ampada, Buffy's South American exchange student previously thought by the gang to be a boy.
Xander falls in love with the female Ampada and asks her to the dance and she accepts. Willow is contemplating her love for Xander but hasn't decided to give up on him yet. Unfortunately, while she pines over Xander she fails to notice the attention she is receiving from handsome older student Oz.
Buffy and Giles discover the truth about Ampada and try to reassemble the seal but Ampada intervenes. She tries to kill Willow so she can keep her humanity but Xander offers himself. Ampada cannot kill someone she loves and eventually her body turns to dust. Original airdate: October 6th 1997
