With the Buffybot being utilised to keep both the world and underworld from knowing that the Slayer’s dead, the Scoobies are still grieving. However, without the knowledge of the others, Willow, Xander, Anya, and Tara have been plotting to take advantage of a rare opportunity to resurrect Buffy from the dead.
As Buffy tries to get used to being alive again, an entity haunts the Scoobies that’s tied to the Slayer’s resurrection.
When a pipe breaks in the Summers basement, Buffy finds herself in a battle with debt. Trying to get a loan, she finds the bank is attacked by a demon that was hired out by a trio of upstarting nerds bent on crime. Meanwhile, Giles returns and tries to take in what went down in his brief absence.
Buffy is presented with the question of the future of her life. From there, she audits classes with Willow and Tara, attends Xander’s construction site, and tries to work in the Magic Box. However, each time, she experiences weird phenomenon. Little is she aware that she is being tested by the Trio to test her abilities as an upcoming adversary to their plans.
While everyone celebrates Xander and Anya’s engagement announcement, Dawn spends Halloween hanging with her friend and two boys. When she’s found to be lying about her whereabouts, everyone goes out looking for her, including Tara and Willow who get into a heated talk concerning the latter’s overuse of magick.
Hope Sandoval -- Around My Smile, Nikka Costa
-- Everybody Got Their Something, Man of the Year -- Just as Nice
Everyone in Sunnydale, including the Scoobies, find themselves bursting into song and dance. It seems innocent at first, but turns serious when burned up bodies begin to turn up. Buffy and the others also find themselves belting out their buried fears and feelings, so that before the curtain falls, certain secrets will be unveiled.
As everyone reels from Buffy’s revelation, Giles readies himself to again leave for England for the sake of Buffy. Tara reveals to Willow that she knows about the memory spell she used on her to make her forget their last fight. In order to solve both problems, Willow casts another amnesia spell, but it backfires and everyone loses their memories, leaving the Scoobies to try to piece together who they are.
Despondent over Tara leaving, Willow returns Amy to her human form, so as to have another bewitched playmate. As the Scoobies investigate a jewellery heist that left a guard frozen, Spike discovers that something is amiss with his chip.
When Willow find her powers have burned out, Amy takes her to a warlock to hook her up with unlimited juice. Buffy is racked with disgust and guilt over her sexual romp with Spike, but needs his help when she finds out about Willow’s addiction and that Dawn is out with her.
With Spike’s continuing advances and a Social Services worker watching her back, Buffy is all too happy to disappear after the Trio accidentally hits her with their invisibility gun. Unfortunately, Willow gets suspected, as she tries to go cold turkey on magick.
Buffy gets a job working at the fast-food restaurant Doublemeat Palace to help with finances. Observing the strange behaviour of the workers, added to the oft-disappearing employees and the mystery surrounding the secret ingredient, Buffy puts a sickening picture together. Meanwhile, Willow’s recovery gets hampered when Amy gives her some unwanted power.
Songs: Trespassers William -- I Know
As Buffy sinks further into the dark with Spike, the Trio use an instrument to get women to do their bidding. However, things get out of hand and their situation turns deadly serious. They then use Buffy as a means of covering their tracks, forcing the Slayer to see where she really is.
Songs: Bush -- Out Of This World
The Scoobies and a few other friends gather at the Summers home to throw Buffy a birthday party. However, they soon find that even when they try, they can’t seem to make themselves leave the house. The enclosed environment brings up tension among them, especially when a demon is freed inside.
Riley unexpectedly returns to Sunnydale to enlist Buffy in a special mission. Buffy’s relief at Riley’s presence is destroyed when she quickly finds out he’s now married.
A nervous Xander readies to wed Anya. However, a stranger claiming to be himself from the future tries to warn Xander of the consequences of their marriage.
After Buffy is attacked by a demon as she gets close to the Trio’s lair, she begins experiencing hallucinations of herself in a mental hospital with her still married parents looking out for her. Initially, dismissing them, the recent burdens of her life and her own history in a mental hospital make Buffy question whether she is the Slayer or if she's still in an institution.
Anya returns, and, unbeknownst to anyone, as a vengeance demon. Unable to inflict pain on Xander herself, Anya tries to cajole his friends to wish up a proper punishment. Meanwhile, Spike is locked out from Buffy and is frustrated she won’t tell her friends about them. He then moves on to find a way to numb his pain.
Songs: Tom McRae -- Sau Paulo Rain, Alison Krauss -- That Kind of Love
While Willow and Tara have reunited, Buffy's friendship with Xander is endangered following the revelation of her sexual relationship with Spike. In the aftermath of the heartache caused from his tryst with Anya, Spike is dead set to prove he truly loves Buffy, bringing him to carry out an unthinkable act.
Songs: Azure Ray -- Displaced
With his cohorts in jail, Warren claims to have killed the Slayer, unaware that he actually killed Tara and Willow has embraced the darkest of magicks to reap bloody vengeance. Meanwhile, Spike has fled Sunnydale to Africa to find a means of restoring himself to what he once was.
Songs: The Misfits -- Die, Die My Darling
Buffy, Xander, and Anya race to keep Andrew and Jonathan safe from becoming Willow’s next targets in her magick-induced thirst for retribution. Having now taken a life, she has become fully enveloped in dark power and isn’t hesitant about eliminating anyone who gets in her way.
As the others continue to protect Jonathan and Andrew, Willow battles Giles when she is forced to take his power. Now overwhelmed with emotion, Willow feels the suffering of the world and decides to end it... by ending the world itself.