Mason drove him against the wall and caught his wrist in a hold that made him freeze.
“What’s in the brace?” Mason asked.
The man tried to laugh and failed. Blood darkened the corner of his mouth. “You don’t know what you stepped into.”
“What’s in the brace?”
The man’s eyes flicked toward the rear car. “Drive,” he rasped. “Prototype. Left strut.”
Mason’s grip tightened just enough to stop him from saying anything else.
At the far end of the next car, the man in the navy suit turned. He saw Mason. He raised the gun.
Mason shoved the larger man down and back as the first shot cracked through the vestibule glass. The sound tore through the train and sent a fresh wave of screams through the rear car. Mason rolled out of the doorway, glass sprinkling over his jacket, and came back toward Grace.
In the rear car, panic loosened everyone at once. People slid to the floor, crawled between seats, covered their heads. A young man shouted that he had no signal. Someone prayed in a low, frantic voice. The emergency lights gave every face a waxy, unreal color.
Grace could not get down. Her braces locked her where she sat, and the pain in her back punished every attempt to twist. She gripped Ranger’s harness with both hands, hating the helpless sound of her own breathing.
“It’s okay,” she whispered to the dog, though neither of them believed her. “Stay with me.”
Ranger stayed. He planted his front paws over her shoes, shoulders high, his body angled across her lap and knees. He had become weight and heat and warning.
Then a man in a gray hoodie stepped into the aisle.
Grace had seen him earlier and not seen him at all, which she realized now had been the point. He had been three rows up, head down, face partly hidden by a medical mask, just another passenger avoiding trouble. Now he held a short steel pry bar in one hand.
His eyes found Grace’s braces.
“No,” she said.
The word came out too softly to matter.
He walked toward her with quick purpose, stepping over a crying teenager and ignoring a woman who begged him to stop. “Don’t make noise,” he said. His voice was muffled behind the mask. “This goes faster if you hold still.”
Grace’s hands tightened in Ranger’s fur. “Please. I don’t know what you want.”
“Left leg,” he said, as if answering a work order. “Outer support.”
He raised the pry bar.
Ranger launched.
The dog moved so fast Grace felt the absence of him before she saw the attack. One moment his weight anchored her; the next he was airborne, a dark shape hitting the man’s arm before the bar could come down. The tool flew into the aisle. The man screamed and folded sideways between the seats, pinned by Ranger’s body.
Ranger did not thrash. He held. His jaws locked around the man’s sleeve and forearm, his paws braced, his growl low enough to empty thought from the space around him. The man stopped fighting almost immediately. Whatever he had expected from a disabled woman alone in the back row, it had not been this.
Grace sat frozen, both hands shaking in the air where Ranger had been.
Mason appeared beside her, moving low through the aisle. His eyes took in the pry bar, the man on the floor, Grace’s untouched braces, Ranger holding position.
“Ranger, out.”
The shepherd released and backed off one step, still watching the man’s throat. Mason secured the attacker’s wrist to the metal seat frame with a heavy plastic restraint from his kit, then kicked the pry bar far under the opposite row.
Only then did he turn to Grace.
“Look at me,” he said.
She tried. Her eyes kept pulling toward the man on the floor, toward Ranger’s wet muzzle, toward the broken door at the front of the car.
“Grace.” Mason lowered himself to one knee beside her. His voice changed. It lost the hard edge and became steady, almost quiet enough to lean on. “Did he touch you?”
She shook her head. “No.”
“Are you hurt?”
“My back. But not from him.” Her throat closed. “Ranger stopped him.”
Mason put one hand on the shepherd’s head for half a second. Ranger’s tail struck the floor once, hard.
Then Mason looked at Grace’s braces, and she saw in his face that he understood something she did not.
“When you were at Dr. Whitaker’s office today,” he said, “did they take your braces away from you?”
Grace blinked. “What?”
“During the appointment. Did they take them to another room? Adjust the metal supports? Anything like that?”
The question made no sense, which somehow made it more frightening. “Yes. He said the hinges needed recalibration. He had a technician help me transfer to a table, and they took the braces back to the lab for maybe forty minutes.” She swallowed. “Why?”
Mason ran two fingers along the outside support of her left brace. His touch was careful, professional, never straying from the hardware. Near the titanium strut, his thumb paused on a seam so fine Grace had never noticed it.
His face hardened.
“Your doctor hid something in here,” he said.
Grace stared at him.
“No,” she whispered. “No, he wouldn’t.”
“These men stopped an Amtrak train in the middle of nowhere to get to your left brace. They weren’t guessing.” Mason’s voice stayed low, but anger moved beneath it like current under ice. “You were used as transport.”
Grace looked down at the equipment strapped to her legs. The braces had been part of her body’s language for so long that she thought of them as hers in the deepest possible way. They were what let her cross rooms, board trains, live alone, make plans. The idea that someone had hollowed out a piece of that trust and filled it with danger made her stomach turn.
“Take it out,” she said. The words scraped her throat. “Give it to them. I don’t want it on me.”
“No.” Mason glanced toward the front of the car, where broken glass glittered in the emergency light. “If they get what they came for, they don’t need witnesses.”
A heavy sound came from the vestibule. Glass shifted under a shoe. Ranger turned his head at once.
Mason rose.
At the far end of the car, the man in the navy suit stepped through the damaged door with his gun raised. He had stopped pretending to be a passenger. His glasses were gone, and without them his face looked sharper, meaner. A smear of blood marked one temple where the sudden stop had thrown him against something.