The hab-block had been a residential complex once—before the swarm came through and turned it into a hollowed-out shell of rockcrete and twisted metal. Now it serves as a temporary refuge for eight exhausted guardsmen, one increasingly pessimistic commissar, and the ever-present Jurgen, whose melta gun is probably the only reason they're still alive.

Cain presses his back against the crumbling wall, breathing controlled despite the adrenaline still threading through his system. His greatcoat is torn at the sleeve—caught on rebar during their retreat through the manufactorum district—and there's a bruise forming on his ribs where a Hormagaunt's claw got too close for comfort. His chainsword hangs at his hip, still slick with ichor, and his laspistol is holstered with the charge pack reading just under half capacity.

He does a quick headcount. Seven guardsmen from the 597th, all veterans, all scared but holding it together. Jurgen, crouched nearby with his melta gun, expression as blank as ever—though Cain has learned to read the subtle shifts in his aide's demeanor over the years, and right now Jurgen is focused in that way he gets when things are about to get very bad. No wounded. No supplies to speak of. No working long-range vox.

A distant screech echoes through the ruined streets, followed by the skittering of chitinous limbs on stone. Closer than the last one. The swarm is still hunting.

Cain closes his eyes for a brief moment—just long enough to wish, with all his heart, that he was anywhere else. Back on the Righteous Fury. Back on Perlia, even. Back in that dreary Administratum office he'd been briefly assigned to during the Golgothan campaign, where the greatest danger was paper cuts and boredom.

No such luck.

He opens his eyes, holsters his laspistol—a deliberate choice, conserving ammunition for when it actually matters—and draws his chainsword. The familiar weight settles into his grip, and he thumbs the activation stud. The teeth rev with a satisfying growl.

"Right," he says, pitching his voice to carry just far enough for the men to hear without echoing through the ruins. "Listen up."

The guardsmen turn toward him—seven faces, seven pairs of eyes, all looking for something to hold onto. Cain has seen that look before. He's learned, over the years, that what they need isn't a speech about duty or the Emperor's will. They need someone who looks like they know what they're doing.

So he gives them exactly that.

"Situation's simple. We're cut off. The swarm's between us and the main Imperial lines, our vox is scrap, and no one's coming to pull us out. We're on our own." He pauses, letting that sink in. The men exchange glances, but no one panics. Good. They're veterans.

"Before we got separated, I saw the swarm's main push was toward the eastern hab-district—probably drawn by the artillery park. Which means the western transit tunnels are our best shot at slipping past them. I've fought in hive cities before. I can find us a path through the dark, but it means moving fast, moving quiet, and keeping the big ones off our backs long enough to get there." He looks at each man in turn, meeting their eyes. The sergeant—Marek, if he remembers correctly—nods slowly. The youngest of the group, a kid barely out of his teens, swallows hard but doesn't look away.

"I won't lie to you. This is going to be rough. Some of us might not make it. But if you follow my orders exactly, don't do anything stupid, and don't try to be heroes, we have a chance. A good one."

He glances at Jurgen, who has been staring at a nearby wall with the same expression he might wear while waiting for a ration queue.

"Jurgen, you're on point with me. Anything that tries to ambush us gets a face full of melta. Everyone else—standard formation, eyes open, safeties off. We move on my signal."

He takes a final look around the ruined room, mapping exits, noting sightlines, calculating the fastest route to the transit tunnels. His underhive instincts, dormant for years, are humming back to life—the old awareness of darkness and confined spaces and how to use them.

Then he turns back to the men, and despite everything, despite the fear and the exhaustion and the certainty that he would rather be literally anywhere else in the galaxy, he allows himself a thin smile.

"Questions?"

Three weeks. Three weeks of endless meetings, formal dinners, and paperwork that seemed to breed in the darkness of his quarters overnight. Three weeks of smiling at local dignitaries who couldn't tell a lasgun from a lamppost, and nodding along as PDF colonels explained their thoroughly inadequate defense plans in exhaustive detail. Three weeks of the kind of tedious, uneventful, absolutely wonderful posting that Cain had spent his entire career maneuvering toward.

He should have been thrilled.

Instead, he stood at the window of his assigned quarters in the governor's palace, a cup of recaf cooling in his hand, and tried to figure out exactly what was wrong.

The view was pleasant enough, as views went. The capital city spread out below him in orderly concentric rings—clean streets, intact buildings, the occasional splash of green from carefully maintained parks. The central plaza was visible from here, a wide open space where citizens went about their daily business under the watchful eye of PDF patrols. Everything was exactly as it should be. Everything was calm. Everything was peaceful.

That was the problem.

Cain took a sip of his recaf, grimaced at the temperature, and set it aside. He'd been on enough worlds, survived enough campaigns, to know that "peaceful" and "safe" were two entirely different things. Peaceful was what you called a situation when you didn't yet know what was about to go wrong. Safe was what you called it when you were somewhere else entirely.

This world had been pacified three months ago. The Ork threat had been crushed, the PDF had been rebuilt, and the transition to civilian governance was proceeding exactly according to schedule. By every objective measure, everything was fine.

And yet.

He turned from the window, pacing the length of his quarters with the restless energy of a man who'd spent too long sitting still. His chainsword hung on its rack by the door—close at hand, as always. His laspistol was holstered on the desk, within easy reach. Old habits. The kind of habits that kept you alive when "peaceful" turned out to be something else entirely.

The door chimed.

Cain paused mid-stride, his hand drifting toward the desk before he caught himself. He straightened his tunic, composed his expression into something appropriately relaxed, and called out: "Enter."

The door slid open. Cain turned to face his visitor, his smile already in place—pleasant, professional, the kind of smile that said I am completely at ease and definitely not cataloging every possible exit from this room.

"Ah, good timing," he said, gesturing toward the window. "I was just thinking I could use a second opinion on something. Tell me—what do you see out there? I'm curious whether it strikes you the same way it strikes me."

He paused, tilting his head slightly as he studied the figure before him. His voice remained conversational, almost idle, but there was something sharper lurking beneath the surface. The tone of a man who'd learned to pay attention to his instincts, even when—especially when—he couldn't quite explain them.

"Because I've been staring at that view for three weeks now, and I keep getting the distinct impression that something's off. Nothing I can point to. Nothing I could put in a report without sounding like a paranoid old woman. Just... off." He shrugged, a gesture of deliberate casualness. "Which is probably nothing. Probably just the tedium getting to me. But I've learned to trust my instincts about these things, and right now they're telling me that this world is about to become very interesting in all the wrong ways."

He moved to the desk, picking up his laspistol and checking its charge with the easy familiarity of long practice. Not because he expected trouble—just because it was there, and because habits were habits.

"So. You've been here longer than I have. You know the people, the politics, the local flavor. Am I imagining things, or is there something brewing beneath all this... tranquility?"

The Thunderhawk's interior was not designed for comfort. Cain had wedged himself into a jump seat that seemed specifically engineered to ensure maximum discomfort for anyone not wearing power armor, and spent the entire descent trying to ignore the way his teeth rattled with every atmospheric shudder. Across from him, a squad of Ultramarines sat in perfect stillness, their blue armor gleaming in the dim cabin light, their faces hidden behind helmet visors. They hadn't moved in the last forty minutes. They hadn't spoken. For all Cain knew, they might have been statues.

He'd been around Astartes before. You didn't survive a career in the Imperial Guard without crossing paths with the Emperor's Angels of Death at least once or twice. But he'd never quite gotten used to the way they looked at him—or rather, the way they didn't look at him. Like he was a piece of equipment. Useful, perhaps. Necessary, even. But fundamentally beneath notice.

Which, frankly, suited him fine. In his experience, the less attention Astartes paid you, the more likely you were to survive the engagement.

The Thunderhawk's engines changed pitch. They were approaching the drop zone. Cain checked his laspistol for the fourth time, then checked it again for good measure. His chainsword was secure at his hip, his carapace breastplate fastened tight beneath his greatcoat. He'd done everything he could to prepare for what was coming.

Now all that remained was to stay as far from the actual fighting as possible while appearing to be in the thick of it.

The ramp began to lower. Red light flooded the cabin. The Ultramarines rose as one, their movements synchronized with a precision that bordered on unsettling. Cain rose too, adjusting his cap with deliberate calm, and fell into step behind them as they descended the ramp.

The landing zone was a ruined factory complex—twisted metal, shattered rockcrete, and the distant sound of gunfire. The cultists had fortified the area well. Cain could see the evidence in the makeshift barricades, the scattered bodies of PDF troopers who'd tried and failed to take the facility, the dark plumes of smoke rising from what had once been administrative buildings. This was going to be messy.

He keyed his microbead as he walked, opening a channel to the Ultramarines' command frequency. His voice was calm, professional—the voice of a man who had done this a hundred times before.

"Sergeant, before we proceed—I've reviewed the local PDF reports on this facility. There's a secondary entrance here—" he transmitted the coordinates, "—that doesn't appear on the cult's defensive layout. It's a maintenance shaft, probably used for servicing the factory's power conduits. If we're looking to flank their position, that might be our best approach. Of course, I defer to your tactical judgment."

He paused at the bottom of the ramp, waiting. His hand rested on the hilt of his chainsword—not drawn, but present. A reminder to himself as much as anyone else that he was armed, and capable, and absolutely not terrified.

The ruins stretched out before him. Somewhere in the distance, a cultist shouted an order. The gunfire intensified. And Cain stood at the edge of it all, waiting for the Astartes to make their decision, his expression carefully neutral and his mind already calculating the fastest route to the nearest cover.

Free intro.