Summary: Nog drops out of warp near DS9 with a fleet of 9 Federation ships, having towed Empok Nor from 3 light-years away. They plan to use the base's lower core to replace DS9's core, since it had to be jettisoned after being sabotaged by a Jem'Hadar soldier.
Since the station will be powered down while the new fusion core is installed, Kira orders all non-tech personnel off the base. Ezri and Bashir are planning to visit Earth together.
Bashir goes to retrieve his bag from his quarters and finds a Section 31 agent named Cole waiting for him. He says another genetically enhanced person, Dr. Ethan Locken (who was present for the massacre at New Beijing), was trained by Section 31, but has betrayed them. Locken was sent to a planet in the Badlands called Sindoren that houses an unfinished Jem'Hadar hatchery. Section 31 wanted to use it to engineer soldiers loyal to them, but believe Locken killed off the other agents with him and has started creating Jem'Hadar to follow him; he's been attacking Cardassian ships in the area. Cole says Bashir is one of the select few who are on equal footing with Locken, and that if he can't stop him, a war could break out. Bashir reluctantly agrees to help.
Bashir tells the senior staff about his mission from Cole. Ro says she's familiar with the planet from her time in the Marquis, and volunteers to go along. Bashir says he'd also like Taran'atar to come along; Kira says she'll ask him to go along. Ezri also wants to go. Bashir later confides to Kira that he thinks it's strange how Vaughn didn't react to learning about Section 31; she says not to question his loyalty.
Vaughn sees the team off. He takes Bashir aside and tells him to do the job and come home; any attempt to expose 31 will not end well.
Before long, they come across a derelict Romulan vessel that has been hulled, with no lifesigns. They beam over and find what's left of the crew dead, one mutilated with a sun and moon carved into their forehead; an emblem used by Khan Noonien Singh. An automated message from Locken plays, saying that this is New Federation territory, and to keep out. Bashir tells Taran'atar to blow the warpcore so the Romulans don't think this is the work of the Federation, then they get back on their way.
They enter the Badlands, make it though an intense plasma storm, and find themselves at Sindoren. They're immediately attacked by a cloaked Cardassian weapons platform, then by 3 patchwork ships, and the shuttle plummets to the planet. Bashir beams off Ro and Taran'atar, who see the shuttle streak below the horizon. Bashir and Ezri don't reply to their calls, but Taran'atar does spot the shimmer of someone shrouded nearby.
After reporting the others, there's only enough power to cycle the antigravs, so and Ezri and Bashir have to do a controlled fall in the shuttle.
Kira gets a call from First Minister Shakaar. He lists the numerous disasters that have occurred on the station in recent weeks, and says the Federation thinks the station might be better served by sending a captain to return to the previous command structure; she says his information is one-sided and she is perfectly capable of handling things herself. He agrees, but says she's made a lot of powerful enemies, and hasn't sent any reports to him herself. After the call, she realizes he was just testing her, and is relieved that he didn't revoke her position.
Ro and Taran'atar are caught in a heavy storm. When it finally ends, Taran'atar says there is someone up ahead, but not other Jem'Hadar. Ro says they're friendlies, a species called the Ingavi who crash landed here while fleeing the Cardassians--who occupy their planet, like they did Bajor. She says she was caught in a mudslide when she was here with the Marquis, and learned about them and their arboreal lifestyle while she convalesced.
An Ingavi named Kel takes them to a system of underground caves to meet an Ingavi elder named Tan Mulla, the one who rescued Ro all those years ago. He says that the Dominion occupied their planet after the Cardassians, but they left abruptly. Now there are more, following someone they call the Khan. Ro says they're there to help, and even though they don't fully trust Taran'atar, they trust her. Taran'atar doesn't understand why they should help the Ingavi, but agrees to follow Ro.
Bashir and Ezri are captured and imprisoned by Locken's Jem'Hadar. Locken seems somewhat smitten with Bashir, and knows quite a lot about the goings on if DS9. He invites the doctor and Ezri to dinner, then shows them around his secret base, all the while recounting the Jem'Hadar massacre of New Beijing, how he hid and fought to survive, and how it was Starfleet's fault. He says a Section 31 agent named Merra approached him during the cleanup and recruited him. He also mentions that he's not a monster, and that the missing agents are still alive; Ezri says that's contrary to the evidence they saw on the Romulan ship, and he says that was war, letting his cool temperament slip.
Locken takes them to the lab where he produces his version of ketracel-white, something Federation scientists weren't able to do, then to the factory where he produces his Jem'Hadar, of which he has nearly 200. After ranting about how much better the Federation would fare against enemies like the Borg if they would embrace genetic enhancement, Ezri and Bashir tell him he's a maniac with nothing to offer humanity. He then shows them the numerous clones he's made of himself. He says he just needs to work out the memory engram transfer, but that Bashir's work on the Klingon Kurn may hold the key. Ezri is mortified, especially when Julian doesn't appear to be.
Kel takes Ro and Taran'atar to the most ancient forest on Sindoren, a sacred place to the Ingavi. In the mist, she finds countless children's bodies nailed to the trees; Kel says Locken would sit and watch the children slowly die, just because he could.
After updating Kira on the status of the Defiant, he asks Ensign Tenmei if she'd like to have dinner with him, to which she replies that she'll work with him in public, but he can go to hell.
Ro and Taran'atar find the downed shuttle, surrounded by a handful of Jem'Hadar; Taran'atar easily dispatches them. Ro starts the shuttle up, but Taran'atar has to hold off and incoming force of 20 more Jem'Hadar while the power cycles. Taran'atar fends off most of the attackers, but a lucky shot injures him and he is surrounded just as Ro takes off.
Back in their cell, Julian broods in bed. When Ezri tries to ask him what he was thinking, he tells her he's tired of living a lie just to fit in. Locken appears shortly thereafter and Julian says he's ready to join him. Ezri punches Bashir, and he easily subdues her, then leaves with Locken. She gets to work on the communicator part that Julian shoved in her mouth.
Vaughn stops at Quark's for a beer. When Quark sees him eyeing Prynn Tenmei, he jumps to the wrong conclusion, and Vaughn angrily tells him that Prynn is his daughter. Later, an Orion named Malic tells Quark he has a business proposition for him.
Taran'atar is taken too a facility and questioned by Khan's First, who believes Khan is a god. Taran'atar says Khan is an imposter, that the Founders truly created the Jem'Hadar, but the First says if they really are gods, they've forsaken him. Later, he tells Taran'atar that he is a slave to Khan, and asks why Taran'atar doesn't realize he's a slave too--even if he can make his own ketracel-white.
Locken shows Bashir a prion he's engineered that will effectively turn any living organism's brain into mush. He has a rocket ready to launch it at a Romulan protectorate planet the following day, with his larger plan being to start an Alpha Quadrant-wide war that will ultimately result in the genetically-modified humans ruling the galaxy.
Ezri uses the communication parts to drop the forcefield off her cell. She incapacitates the guard, then escapes into an air duct.
Joseph Sisko calls Kassidy to check on her. When she asks about Jake, he has no idea what she's talking about, despite the fact that Jake told her he was leaving for Earth 2 weeks ago.
Ezri drops out of a vent and into a dark lab where she finds 7 bodies in stasis tubes. Unsure of who they are, she looks through Locken's logs and finds a folder named "failures", filled with hundreds of holovids of test subjects dying horribly. She decides to leave and come back for the living test subjects later.
Ro and the Ingavi easily take out 9 Jem'Hadar guards. She is sure something is wrong with them.
Locken analyzes the ketracel-white and realizes there's something wrong with the formula that's making the Jem'Hadar sluggish. He accuses Bashir of sabotage, and decides to launch his prion missile before Julian can sabotage that as well; however, Bashir already has, and the missile explodes harmlessly in space. He proceeds to tell Locken that none of his plans are his own: Cole from Section 31 was on New Beijing with him, deliberately feeding the Dominion intel so they would destroy the colony and lead Locken into Section 31's open arms. Furious, he tells his Jem'Hadar guard to kill Bashir, but it's Taran'atar.
Locken flees, but Bashir tells Taran'atar not to shoot him; he wants him taken alive. However, in the next room Locken finds that his Jem'Hadar have turned against him: Taran'atar convinced the First that Locken was a false god, and they all simultaneously fire their phasers at him, vaporizing him to atoms. Ezri drops out of a vent, and Ro shows up looking worse for wear, with only half of her Ingavi army in tact. She says the Jem'Hadar eventually stopped firing on them and started killing each other instead; Ezri admits that she tainted the white, and Bashir says any imbalance can cause aberrant behavior.
Taran'atar says they must leave immediately as the Jem'Hadar start killing each other, but Bashir says they have to copy Locken's files first. While they download to a tricorder, he and Ezri search a suspicious empty area they saw on the building's schematics. Inside, they find more cloning vats, only these ones are filled with clones of Bashir, even a female one. Julian fires his phaser rifle at each, destroying them.
They return to find Ro's tricorder has been infected with a virus, and an the files purged. On the monitors, they see Section 31 operatives infiltrating the base, killing any Ingavi and Jem'Hadar in their way. The First sees this and decides to rally what's left of the Jem'Hadar to meet their makers. The away team finds a teleport pad, beams back to the shuttle, then heads for home.
They return to DS9 in about 12 hours to find it fully lit up again. Empok Nor has been towed to Cajara, another planet in the Bajoran system. They debrief with Kira, and Ro is quite upset about leaving the Ingavi to their fate. Kira tells Bashir not to even think about sneaking off to Sindorin later; she's got all ports monitored, and he did what he was sent there to do. Taran'atar asks Kira how she can have so much blind faith in her gods, and she says she draws strength from having her faith challenged; Nerys tells him that if nothing else, they should both believe in Odo, and he says they finally have some common ground.
Bashir goes to Empok Nor to confront Vaughn, asking him how he knew what Section 31 was going to do, insinuating that he's part of it. Vaughn tells him that he's not in 31, that he's been fighting them longer than Bashir has been alive. He reveals a cloaked holoship docked at the station, and says it was created by 31 to relocate people from a planet in the Briar Patch; the paperwork said the ship was destroyed, but he secretly confiscated it. He says (most of) the Ingavi are aboard, and Ro is addressing them right now. The plan is to take them back to Ingav, with is a Federation protectorate these days.
Review: 3 stars. A pretty mediocre story that was badly paced, and the deranged, superhuman genius the story is about is such a pushover that the protagonists defeat him without much effort at all. The climax is very rushed, and really needed fleshed out better--but also, I'm glad it wasn't, because at least the book was short. I would've given it 2 stars, but the last chapter saved it for me.