The Scooby Gang patrol in the absence of the Slayer, who has been dead for five months. Willow and her growing powers lead the efforts and the gang with telepathy and other magic from a perch on top of a crypt. She's even repaired the Buffybot, who helps the group slay several vampires. Willow and Tara are living at the Summers home with Dawn and the Buffybot. Willow has tried to make the robot act more human-like, but her tuning never really goes quite as planned.
The Buffybot is sent out with Dawn for Parent-Teacher Day at Dawn's school. Despite some odd comments and tense moments, the Buffybot doesn't cause much of a scene and isn't suspected of not being real. At the magic shop, Giles is packing up his items in preparation for his return to England. Anya is torn between the idea of losing Giles and taking over the shop on her own.
That night, Spike stays with Dawn while the rest of the gang has a meeting. Dawn suggests that Spike can leave, but he is determined not to leave her to be hurt ever again and starts a card game. The Buffybot hunts a vampire, but gets hit with a bottle and her motion skills are impaired. The vampire realizes the Slayer is a robot and quickly leaves. Anya has found â on eBay of all places â the last Urn of Osiris. Willow's pleased and announces their plans to resurrect Buffy the next night. She stresses that Giles, Spike and Dawn can't know of the plan, and that because Buffy was killed by mystical energy, they have a chance of bringing her back.
Willow returns home to find Spike keeping a wounded Buffybot out of trouble, the Buffybot having been programmed to return to Willow if damaged. The vampire leaves angrily when the Buffybot innocently compliments him on his physique, a programming remnant from her sexbot days, and Buffybot confides in Willow about Spike's constant shame in her presence. Without her real sister, Dawn tries to find comfort from the Buffybot, but doesn't get much. The next day, Giles tries to teach the Buffybot new skills, like breathing, and then she questions Giles' purpose in Sunnydale now that the human Buffy is gone.
The vampire that hit the Buffybot with a bottle brags about it to several "Hellions" â a gang of biker demons â and the news is spilled that a robot has now taken over for the Slayer. After tearing the vampire's head off (when he suggests joining the gang), the demons ride out to wreak havoc in Sunnydale. Willow works a summoning spell in an open outdoor location and a baby deer approaches her. She suddenly stabs the fawn in the throat, collecting its blood, and finishes her spell. She returns to the magic shop, claiming she got the "vino de madre" (wine of the mother) from the black market.
The gang finds a note from Giles stating that he's already left. Not about to accept a silent escape, the Scooby Gang tracks him down at the airport and he gets a proper farewell with presents, signs, balloons and tears (As part of the parting gifts, Tara presents Giles with a finger monster puppet and makes a sound effect tied to Mutant Enemy Productions normally heard at the end of every episode). After Giles departs, Willow, Xander, Anya and Tara return home for final preparations and then head to the cemetery. They prepare the ritual, sitting around Buffy's grave and Willow begins the spell. While performing the spell, Willow's skin is cut by an invisible knife and a large snake is produced from her mouth, but Tara insists that they don't stop.
Meanwhile, Spike watches over Dawn and the demon bikers are tearing Sunnydale apart. Buffybot tries to stop them, but the leader, Razor, wounds her and she runs away to find Willow. The bikers following her reach the cemetery and interrupt Willow's spell by breaking the Urn of Osiris and scattering the gang's circle. One of the bikers tries to take Anya away, but Tara uses magic to get her back. Xander tells Willow that the spell didn't work, but in the coffin, a dead, decaying body reverts back to life in the confused form of Buffy.