A review by archipeligo
Buffy the Vampire Slayer: The Spread of Their Evil by Georges Jeanty, Rebekah Isaacs, Christos Gage, Joss Whedon

4.0

Spoiler

After San Francisco is attacked by a massively powerful Shenlong Dragon, the Scoobies are left scrambling trying to figure out who would have sent it and why. However, humans are not taking this latest assault lying down and have started turning against their magical fellow citizens. Consequently, the president appoints Ophelia Reyes as the new Secretary of the Supernatural. As attacks against magicals increase, Reyes finally declares a Safety Zone for magicals - essentially, as Buffy says, "bringing internment camps back to America."
Giles manages to obtains forged papers, designating him as full human. Xander and Dawn pass more official channels, although they believe Dawn passed only because the magic that created her was meant to hide her. Andrew decides to flee the county, like Harmony, but promises to find an Underground Railroad option to get everyone out, if necessary.
At one point, Willow flies to save some baby Wiccans, but gets so upset over the attack that she comes across as the attacker, instead of the defender through an online video. A Slayer, Jordan, approaches Buffy to become part of the official guards against these anti-magic attacks. Buffy turns them down hard.
Soon, Jordan shows up to escort Willow and Spike to the Safety Zone. Buffy is infuriated and insulted when Jordan tries to say she's weak. After Spike surrenders to keep Buffy and Jordan from killing each other, Buffy declares that she too will go to the Safety Zone.
Unsurprisingly, the Safety Zone is not. Vampires are given weekly rations of blood, but it's not nearly enough. Buffy demands that Spike drink from here to keep himself fed. Willow continues training young Wiccas inside the camps. We see a vamp try to make a break for it, only to be zapped by a force field around the camp. An Ogre tries repeatedly to cause trouble for everyone. Some of the magicals see Buffy as a traitor, encouraged by the Ogre. We hear rumors of water-based magicals dying off. After a fight with the Ogre and his goons, Spike bites into a demon, frightening Buffy. She negotiates to be a Trustee - a guard within the camp's force field to keep order - in exchange for extra blood rations for Spike.
Willow confesses that she could start draining the baby Wiccas, leaving the unable to use magic, but able to leave the camp. Buffy hears of an uprising that the Ogre is planning - he intends to attack the gates when they open to let in water. She moves to stop it, eventually fighting off the Ogre and most of his goons. Jordan and the other camp guards move to help, but Buffy tells them to stay away. She defeats them all and Jordan points out that she might be"the least popular girl on campus" encouraging her to work outside the force field for a few days.
She investigates the work happening outside and discovers demons making magical runes and coding, as well as a blocked off restricted area. A magical comes forward to tell Jordan that water magicals are dying more often and Jordan dismisses him. When the magical makes a break to escape, it's gunned down from a guard tower, shocking Buffy.
Later, the Ogre and some of his compadres attack Buffy in an ambush. She defeats them all and breaks the Ogre's wrists. He confesses to working with the other guards. He confesses that he helps them find magicals for the work crew "no one too smart".
With Spike's help, Willow casts a portal spell to get outside the force field and follows Buffy around. Soon, she figures out that they are building a magical draining and storage device, which could not only drain many of their powers (e.g. witches) but, for many magicals, end up killing them, because they are inherently magical: "The fliers ... humanoid bodies aren't structured for flight. ... Some body types would be completely immobile. ... And those who are only alive because of magic ... they'd definitely die."
They recognize that destroying the device won't help - it would just be rebuilt somewhere else - nor will outing its existence - "They'd deny it ... a fair chunk o' the world might think it's a brilliant idea" - they decide to break out, find who's behind it, and wreck everything.