Spike builds a Buffy robot hopelessly devoted to him, causing Glory's minions to suspect that the besotted vampire is the Key. Buffy goes on a quest guided by the first slayer.
While Buffy is preoccupied with being her sister's keeper, Glory sets out to grab the person whom she now believes to be the Key - Tara.
Angel rushes back to Sunnydale to console a grieving Buffy, and Dawn tries to bring her mother back from the dead by performing a spell.
Buffy and the others face down death in an apocalyptic battle against Glory, who is on the verge of using Dawn to unleash hell on Earth.
Buffy falls into a profound stupor after Glory kidnaps Dawn. Willow goes into the mind of the slayer to bring her back and save the world.