Marden's warships drop from the sky like falling stars.

My view of them is partially obstructed by the snow-peaked mountains looming over the valley where I came against my will with Sam and his men to destroy the Alliance compound. Mere minutes ago we were escaping the compound as the tunnels blew apart behind us. We barely made it out in time, only to find the dots of warships up among the stars, descending from the fleet of battle stations settling into orbit just beyond Kiel's atmosphere.

The warships are so small from far away, I can almost trick myself into believing they're nothing more than a swarm of buzzards. Harmless.

If only that were true. The fleet carries passengers aboard, aliens from the planet Marden. Enemies that were thought to be long gone, who've crossed the universe to restart the old war between our races. Judging by the size of their fleet, they've brought a formidable army.

Not long ago, when I was still under the influence of Commander Charlie's serum, trapped in my own body and unable to disobey his orders, part of me prayed the Mardenites would arrive early. That part wanted them to put an end to my fight against Charlie and the other leaders of the planet, because I've been fighting and losing for too long.

At least if Marden's warriors wiped us out, the Developers who rule Kiel would finally be defeated. The suffering I've known since the day I was born in an internment camp would end. All of this would be over.

But as I watch the Mardenites invade the acid sky from their battle stations, I feel no relief. All I feel is terror.

After I was Extracted from an internment camp on the Surface and told I would live a safe life in the Core, I was naïve enough to believe Commander Charlie was my salvation. But the Core wasn't what it appeared to be and Charlie had terrifying ulterior motives. He tried to use me to betray my friends, but I fought back. He became my worst enemy, the reason I was fighting for my life and lost so much.

Just as he was beginning to show weakness the Mardenites reappeared, and they are a much bigger threat. The last time humans fought them, our army attempted to steal their home and enslave their people. Marden's warriors struck back by planting a machine on the moon that bled acid into our atmosphere. We survived by building cities underground and a force field in the sky to deflect the moon's acid, but we only just managed to destroy the machine on the moon.

With the Mardenites' life span lasting hundreds of years, they've had time to wait, plan, and design powerful weapons. And now when Kiel is at its weakest they have come to attack. Not only to ensure humans can no longer threaten their kind, but also because we took something from them during the last war, something that Charlie has kept secret. The Mardenites believe we murdered their old leader, a being they considered the god of their people, and for that they won't stop until they've destroyed every last citizen.

Even if Commander Charlie finds a way to save himself and his precious citizens in the Core, I don't know how my friends and I will survive a war. The Alliance is weak and scattered throughout the sectors. The old military compound that was the headquarters of our rebellion is in ruins, and those of us who escaped its demolition have nowhere safe to run. The Developers rule the cities belowground and a new enemy descends from the sky. Anywhere we go we'll stumble straight into the path of destruction.

Despite this, every cell in my body rages, screams the same thing: I can't give up. I need to keep fighting.

I need to find a way to survive.

* * *

Beechy lands our X-wing in a forest clearing close to the river. The trees around the clearing grow dense and gnarled, nearly as tall as buildings, blocking out much of the moonlight. Hopefully they'll also block us from the view of enemy ships passing overhead.

The cover of the X-wing opens and freezing wind rushes inside, making me shiver in my safety suit. I'd give anything to be back in the Alliance compound, tucked into a warm bed in one of the bunkrooms with Logan beside me under the covers. My head would rest against his shoulder and he would hold me close as we slept, guarding me from the people who would harm us. The invasion by Marden's army would seem like just a bad dream.

But I can't go back there. The cots, showers, and training rooms were blasted apart and buried beneath the mountain by Sam and his troops. The one place I felt truly safe in the world is gone.

In the seat behind me, Lieutenant Dean unbuckles his seat belt and gets to his feet. "The Mardenite raiders look like they're headed for these mountains," he says.

I follow his gaze beyond the treetops. Before we landed, the smaller Mardenite warships were splitting up into groups, probably to target different locations on the Surface at once. I'm sure many of them will target the city on the other side of the Surface. The city where thousands of innocent child workers, including my friend Nellie, are trapped as bait with bombs implanted in their bodies. Commander Charlie plans to detonate the bombs in the hope of crippling Marden's army. I thought I still had time to convince him his plan wouldn't work and make him pull the child workers out of the city. But Marden's army arrived two days early, and now there's nothing I can do to save them.

Now, the survival of the Alliance rebels and myself takes priority. Most of the groups of Mardenite raiders have passed out of sight, but one is still visible high above the mountain peaks, tiny warships descending through the clouds. At least twenty, thirty in this swarm. They're still far away, but they already look closer than they did a few minutes ago. They must be moving fast.

As long as we keep our X-wing powered down with the lights off, the forest should conceal us if any raiders fly over the valley. But we can't stay here long. With the Alliance base destroyed, we have hardly any supplies and no fortified hideout. We wouldn't last more than a few days exposed out here in the mountains, and it's likely the raiders would discover us sooner than that. We need to get ourselves off the Surface as quickly as possible.

"How far is Sam's hovercraft?" I ask.

"Just through those trees." Beechy's voice sounds muffled through his helmet. It doesn't help that my left ear is still plugged up after my eardrum ruptured during explosions in the Crust camp; it could take months to heal, months for me to hear clearly again. Beechy points to the east, in the opposite direction of the river. "Maybe fifty yards."

That's where Sam and his troops were headed after they fled Alliance headquarters. The hovercraft is their passage back to the Core, though the invasion of Marden's army will slow down their departure.

The Core is the farthest sector from the Surface. It's where we'll all be safest from the fleet and where we can organize ourselves against Marden's army. It's where I need to go in order to convince Commander Charlie to let Logan and the rest of the Alliance prisoners go.

Sam is the last person I want to rely on for help. He targeted me and tried to take advantage of me because I outperformed him in soldier training exercises in the Core. His hatred for me has only grown stronger since then, and now I've gone and shot him. But his hovercraft has a medical facility to treat our wounded, and more supplies than we have aboard the X-wing. If we end up trapped out here...