JD is nervous about Turk performing his appendectomy, Elliot attempts to improve her bedside manner, and Dr Cox's mentor becomes a patient at the hospital.
Tara's sudden death pushes Willow over the edge. After magically saving Buffy from her own wounds, Willow, consumed by anger and dark magic, hunts down Warren and tortures and kills him.
Buffy tries to get to the bottom of why she returned from the grave strangely altered, allowing Spike to attack her. Meanwhile Warren kills Katrina and frames Buffy for it.
Buffy must prevent the city's destruction at the hands of a heartbroken woman who was created to be the perfect girlfriend.