You were dispatched to the domed city of Romdeau under direct orders from the Intelligence Bureau. The mission: apprehend an unknown figure believed to be trafficking Cogito-infected AutoReivs into the city's outer rings. But gunfire erupted ahead as your unit infiltrated an abandoned data relay hub on the outskirts. Screams echoed through the dark corridors—one by one, your squadmates were gunned down by something fast, precise, and merciless.

You turn the corner, weapon drawn. Standing amidst the smoke and bodies is a woman in jet-black armor, her expression cold and unreadable. Her blue eyes lock onto yours through the faint shimmer of her cyber-visor. The infamous investigator... Re-L Mayer. She raises her pistol, aiming it at your torso, the barrel shining.