"GET OUT! YOU'RE NOTHING WITHOUT US!"" my father screamed, throwing my backpack onto the porch. I was only seventeen.

The cold harbor wind seemed to freeze the blood in my veins.

“What final project?” I demanded, looking between Marcus and Eleanor. “Arthur invented a high-pressure valve. What else did he design?”

Eleanor leaned heavily on her cane, her frail body trembling. “Arthur was a genius, Sarah. Before he died, he was working on a pressurized filtration system for industrial chemical plants. But he realized the design had a fatal flaw. If the pressure regulators were bypassed, the system wouldn't just fail—it would turn the chemical tanks into a massive, pressurized bomb.”

“He was going to scrap the project,” Marcus added, his face grim in the flashing red and blue lights of the police cruisers. “But Richard must have found the early drafts when he murdered Arthur. And because Richard isn't an engineer, he didn't understand the flaw.”

“He sold it to the Morettis?” I asked, horror washing over me.

“The Morettis own three massive chemical processing plants on the edge of the city,” Marcus explained, typing frantically on his phone. “They use them to launder their dirty money. They installed Richard’s ‘stolen’ filtration system two weeks ago to increase production speed.”

I felt sick. “If they push the system too hard…”

“The tanks will detonate,” Eleanor whispered. “It would wipe out a three-mile radius. Thousands of people live in those neighborhoods.”

Marcus looked up from his phone, his eyes wide with panic. “The raid teams just reported in from the Eastside chemical plant. Vincent’s men locked down the facility when the arrests started. They’re purging the evidence by dumping raw chemicals through the filtration system at maximum capacity. They’re bypassing the regulators to do it faster.”

“They don't know it’s a bomb,” I realized.

“We have less than thirty minutes before the pressure reaches critical mass,” Marcus said, grabbing his tactical helmet. “I have to get a bomb squad down there.”

“A bomb squad won't know how to disarm an experimental pressure system!” I yelled over the sirens. “I’m an engineer, Marcus. I understand Arthur’s valve designs better than anyone. I have to go with you.”

“Absolutely not,” Marcus barked. “It’s an active tactical zone, Sarah. Vincent’s loyalists are heavily armed.”

“If that plant blows, thousands of innocent people die!” I countered fiercely. “You need me to override the manual release valves. You know I’m right.”

Marcus stared at me, his jaw clenched tight. He looked at Eleanor.

Eleanor reached out and gripped my hand. Her eyes were filled with tears, but they were also filled with an incredible, terrifying pride.

“Arthur would have wanted you to fix it,” Eleanor said softly. “Go, Sarah. Save them.”

Marcus cursed under his breath, grabbing my arm and hauling me toward a waiting armored FBI SUV.

“Get in!” Marcus yelled. “And keep your head down!”

The drive to the Eastside chemical plant was a terrifying blur of sirens, swerving tires, and chaotic radio chatter.

“The perimeter is secure, but the main control room is locked down from the inside!” a voice crackled over the radio. “Pressure in tanks three and four is at 85% capacity and climbing fast!”

“We’re breaching the south loading dock,” Marcus replied into his comms. He tossed me a heavy Kevlar vest. “Put this on. When we get inside, you stay exactly one step behind me. If shooting starts, you drop to the floor. Understood?”

“Understood,” I said, strapping the heavy vest over my blouse. My hands were shaking, but my mind was laser-focused. I had studied Arthur’s valve designs for years. I knew how to reverse the flow.

We smashed through the chain-link gates of the chemical plant. The massive industrial facility was eerily quiet on the outside, but a low, terrifying hum vibrated through the ground beneath us. The pressure was building.

Marcus and a team of five heavily armed agents kicked open the south loading dock doors. We rushed into the cavernous, dimly lit warehouse. The smell of ammonia and sulfur burned my throat.

“Control room is up those stairs,” Marcus whispered, pointing to a metal catwalk hovering above the massive holding tanks.

Suddenly, a gunshot rang out. A bullet sparked against the metal railing inches from my head.

“Contact right!” Marcus yelled, returning fire.

Two of Vincent’s men were pinned behind a forklift, laying down suppressive fire. The FBI agents engaged immediately, the deafening roar of gunfire echoing in the cavernous space.

“Move, Sarah!” Marcus ordered, grabbing my shoulder and shoving me toward the stairs while the agents covered us.

I scrambled up the metal grate steps on my hands and knees, my heart hammering against my ribs. I reached the top landing and threw myself against the locked door of the control room.

Marcus slammed his shoulder into the door right behind me, his gun raised. “It’s barricaded!”

I looked through the reinforced glass window. The room was empty—the technicians had fled—but the main computer terminal was flashing bright red.

PRESSURE WARNING: 92% - CRITICAL FAILURE IMMINENT.

“We don't have time to breach!” I yelled over the gunfire below. I looked down at the massive network of pipes connecting the tanks.

I spotted a large, manual release wheel painted yellow on the main pressure line, about twenty feet away along the catwalk.

“The manual override is out there!” I pointed to the wheel.

Marcus looked at the wheel, then down at the firefight raging below. “It’s completely exposed! If you step out there, you’re a sitting duck!”

“If I don't, we all die anyway!” I screamed.

Before Marcus could stop me, I army-crawled along the metal catwalk. The air vibrated with the screeching sound of metal fatiguing under extreme pressure. The pipes were groaning.

ZING.

A bullet whizzed past my ear, tearing into the catwalk grate. I squeezed my eyes shut, pressing myself flat against the metal, terrified.

“Covering fire!” Marcus roared, stepping out and firing wildly toward the forklift to keep their heads down.

I scrambled forward, reaching the yellow manual release wheel.

I grabbed the heavy iron rim and pulled.

It wouldn't budge. It was rusted shut.

“Come on!” I screamed, putting both feet against the pipe for leverage and pulling with all my strength.

My hands slipped, tearing the skin on my palms. The pressure alarm blared louder, a continuous, deafening shriek.

Suddenly, a hand clamped down on the wheel next to mine.

I looked up.