I made it home. But something came with me …

From hero to outcast. From saviour to biohazard …

As hollow victories go, this one is hard to beat.

When Driver and I saved Earth from the Anomaly's suffocating radiation, we thought it was all over.

Our triumphant return from the occupied alien world of Bayzen was supposed to draw a line under everything.

The problem is, we didn't come home alone.

No one has ever seen anything like this.

What they're calling it sends shivers down my spine: a parasitic alien pathogen.

It could be a virus, a toxin, or maybe something even worse. And believe me: what we don't know definitely can hurt us.

It's too late for me—I've been exposed. But this has never been about me.

It's going to take some incredible risks and another long-shot space mission to get to the bottom of this, but I'll fight until my last breath to undo the damage I've done.

As a horrible question echoes in my mind, I'll do anything to make sure the answer is the right one:

Am I Earth's last hope … or the man who sealed its fate?