As I stepped onto the plane, the flight attendant leaned in and whispered, “Pretend you’re sick and get off the aircraft. Now.” I almost laughed, thinking it was some strange joke. But minutes later she returned, eyes wide with terror. “Please… I’m begging you. Leave.”

She hesitated. “The man in row 18 was originally assigned to your seat. Near the emergency wing exit. He boarded under diplomatic clearance. We can’t search him. We can’t question him.”

“Diplomatic?” I echoed.

“And he’s under federal monitoring for suspicious activity,” she whispered. “We were told to watch him… but he’s different today. He’s never changed seats before.”

My stomach twisted. If he had planned something, he expected to be in my seat.

“What should I do?” I asked.

Her eyes filled with dread. “Stay alert.”

Then the plane jerked violently.

Not turbulence—a shudder that shook the whole cabin. Passengers gasped. Fear surged instantly.

The man in row 18 stood again. The metallic device was tight in his fist. Harper sprinted toward him, but he lifted his hand.

“I just need five minutes,” he said shakily. “Then everything will be fine.”

A man nearby shouted, “Sit down!” Someone else reached toward him, but he stepped back, panicked.

“Stay away,” he warned. “I don’t want to hurt anyone.”

Harper inched forward. “Then let me help. What is that in your hand?”

He shook his head. “I’m not here to destroy anything.” His voice cracked. “I’m here to stop something.”

Silence froze the air.