Buffy and Kendra go to Giles for assistance in explaining their situation. They learn that Kendra is the slayer who was 'called' when Buffy temporarily died in her fight with The Master in "Prophecy Girl". Their discussion reveals that Kendra had locked Angel in a cage, leaving him to be dusted at sunrise. Buffy and Kendra arrive to find only an empty cage; Buffy fears the worst, but Kendra points out the absence of dust.
Willy (the bar guy) had saved Angel from near-death, only to dump him in a sewer with Spike. Spike takes Angel back to the warehouse, where he will be held until he can be sacrificed to restore Drusilla to full strength. Drusilla asks Spike to let her torture Angel. Although Spike briefly hesitates, he soon smiles and agrees, unable to resist indulging her whims. Meanwhile, as Buffy ruminates on the co-existence of two slayers, she entertains the possibility of quitting and letting Kendra take over her Slayer duties.
Giles begins to bond professionally with Kendra, who seems to be more dedicated to her calling than Buffy, on a professional, intellectual and academic level. Xander and Cordelia face even bigger problems when they find that the salesman that Cordy let into the Summers' house is actually an assassin who can transform himself into thousands of mealworms. They run and hide in the basement, although before long they are fighting each other. After an unexpected kiss, Xander and Cordelia rush to escape the basement, running past the attacking worm-monster. At school, the career placement test has thrown Willow and Oz together, and they discuss their similar interests. Buffy, whose test results recommend a career in law enforcement, attends the career fair seminar to appease Principal Snyder. The police officer leading the seminar calls Buffy's name, but when Buffy identifies herself, the officer draws her gun and points it at the Slayer. Buffy avoids the bullet, which instead hits Oz as he pushed Willow out of harm's way. Kendra comes to Buffy's rescue, and they fight off the attacker. The Scoobies then gather in the library, where Giles announces that Spike intends for Angel to die in the ritual to restore Dru. Buffy angrily announces that Spike can do anything to her, but he had better not mess with her boyfriend.
Meanwhile, Angel is being tortured by Dru, both emotionally and physically; she pours holy water on him as she reminds him about how he killed her whole family. Spike comes in and announces that it is time for the ritual to begin. Angel taunts Spike with insinuations that Spike is unable to satisfy Dru, in hopes that Spike will kill him before he can be used to cure Dru. Spike is infuriated, but does not lose sight of the big picture. Meanwhile, Kendra gains a newfound respect for Buffy's qualities as a Slayer. Later, the Slayers go after Willy to learn what happened to Angel; they force Willy to take them to the location of Spike and Angel, but they arrive too late to prevent the ritual. Buffy attacks Spike to save Angel, and Kendra and the Scooby Gang arrive to back her up. Xander and Cordelia work together in the hallway to kill the worm assassin; since he can only be destroyed in his "disassembled state", they lure the worms underneath a door into a sticky trap. Willow and Giles work together to stake a vampire while Buffy and Kendra fight several of their own. Spike starts a fire and rushes to rescue the unconscious Dru, hoping that the ritual has had time to cure her. However, Buffy prevents their exit, crushing them in falling rubble. She rushes to the floor to help the weakened Angel, while everyone watches in awe, and she helps him exit the building.
Kendra exchanges parting words; she wears Buffy's shirt. She even tells Buffy she does not blame her for being with Angel, since he is "pretty cute", and that slaying is not a job, is a part of who they are. After her departure, Drusilla rises from the rubble, completely revived, and carries Spike out of the mess, promising to take care of him now...