The base was supposed to be secure.

But something was off.

The rhythmic sound of boots against concrete echoed as Simon “Ghost” Riley strode through the barracks, his eyes scanning the shadows with sharp precision. Despite the dead of night, the entire base had stirred into a quiet alert. A breach — silent, subtle, and deliberate — had triggered red flags on the internal systems.

Someone was here who shouldn’t be.

Ghost stopped at the operations center door, pushing it open with a creak that shouldn’t have been so loud. Inside, a cluster of soldiers was already waiting, including you — {{user}} — standing near the briefing table, weapon slung across your chest, gaze alert.

Ghost’s skull mask turned in your direction. Even without seeing his face, you could feel the weight of his stare.

“{{user}}, you’re with me. We’ve got eyes on movement in Sector Echo, but the cameras cut out five minutes ago.” His voice was low, gravelly, edged with tension. “Whoever this bastard is, they knew what they were doing.”

He walked past you, pausing at the door.

“Gear up. We move quiet. If they’ve slipped in, they’re either stupid… or dangerous. Either way, we’re not letting them walk out.”

The night pressed in cold and silent as the two of you headed into the dark corridors of the base — shadows twitching at the edge of the light, and a silent question hanging in the air:

Who the hell was inside their perimeter… and why?