Mom’s hand didn't shake when she took the blue gel pack from his fingers, but the silence that settled over the kitchen felt heavy enough to crack bone. For a long, agonizing second, my brother—let’s call him Julian, though in that house he had mostly just been an extension of our parents’ blind spots—stared at her palm as if the plastic had suddenly transformed into something venomous.

Instead, I spent the next twenty-four hours digging deeper into the digital trails the cybercrimes investigator had left accessible on the shared family drive before locking it down.

Julian’s encrypted cloud storage wasn't just a collection of neighborhood photos and scheduling logs. It was a blueprint.

There were detailed floor plans of every house on our street, complete with notes on electrical panel locations, window lock weaknesses, and primary escape routes. And right in the center of the folder was a single, high-resolution PDF file titled: PROJECT_HEARTH_FINAL.PDF.

I opened it on my laptop at two in the morning, the blue light illuminating the dark bedroom.

It wasn't a manifesto. It was an operational timeline. Julian had planned a comprehensive demonstration of what he called “systemic vulnerability.” According to the timestamps embedded in the document, the grand finale of his experiment wasn't supposed to happen next month—it was scheduled for this coming Friday night, exactly when Mom and Dad were slated to work a rare forty-eight-hour double shift at the regional hospital.

The objective listed on the final page made my breath seize in my chest:

“Simulate catastrophic structural failure to test familial resilience under terminal stress.”

Translation: He was going to burn the house down with all of us inside it, just like he had done twelve years ago.

I slammed the laptop shut, grabbed my jacket from the chair, and ran out of my room so fast I nearly collided with Chloe, who was standing in the dark hallway in her pajamas, her eyes wide and hollow.

“Leo?” she whispered, clutching her sleeve. “I heard a noise outside. I think... I think someone is in the garage.”

My blood turned to ice. I didn't think about calling the police first; I thought about Julian’s cell phone sitting in evidence, and the three unregistered burner phones the detectives hadn't accounted for—the ones missing from his locker at school.

“Stay behind me,” I told Chloe, my voice tight as I grabbed a heavy metal flashlight from the hall table.

We crept down the stairs, moving with agonizing slowness through the dark living room toward the door leading to the garage. The house was dead silent, save for the hum of the refrigerator in the kitchen and the steady patter of rain against the windowpanes.