My father said my military medal made me nothing special. I didn’t argue with him. A few hours later, he learned the truth.

We made it back to the SUV without incident.

Chase sat in the backseat, shivering.

I threw him a jacket.

“You going to tell me what you were thinking?”

He shook his head.

“I was trying to fix things. Nobody accepted my cooperation because I was involved in a federal case. I thought if I could prove my value, maybe I could get a lighter sentence.”

“By meeting with the same people you helped?”

“It wasn’t supposed to go that way.”

“Chase, they’re foreign intelligence agents. They don’t care about your legal problems.”

He looked at me.

“I know that now.”

We drove in silence for a while.

Back at the base, I handed Chase over to the agents.

Then I returned to the SCIF.

The laptop was on the counter.

The agents had confirmed it contained the decryption keys for the backdoor.

But we still had a problem.

The backdoor was embedded in the mission planning software.

Removing it required flipping the encryption on the entire system, which would take days.

We had hours.

The first data burst was due to transmit at dawn.

If it sent, the enemy would get everything.

I stared at the computer screen.

The code scrolled past my eyes.

And then I thought about the grease.

The stain on my medal case.

I remembered how it had spread across the felt, a dark smudge that I had almost cleaned away.

But I hadn’t.

I kept it as a reminder.

And in that moment, I realized what Chase was trying to tell me.

The backdoor wasn’t in the code itself.

It was in the *stain*.

A piece of code that looked like a harmless metadata tag.

A tag that no one would notice because it looked like normal beacon data.

But it was the entry point.

Once you knew where the stain was, you could cut it out cleanly.

I opened the code editor.

I found the tag.

It was a single line of hex that had been inserted into every file we had examined.

It looked like a timestamp error.

A glitch.

We had ignored it because it was so minor.

But it was the gateway.

I deleted it.

And with a few keystrokes, I isolated the entire backdoor.

And shut it down.

The room erupted in cheers.