Plutonian

The cold, sterile air of the Plutonian slave quarters pressed down on Aria, a familiar weight. Another year, another cycle, and the distant hum of the alien city outside the reinforced walls was a constant reminder of her captivity. Today marked her eighteenth birthday, a grim milestone that meant the 'Choice' loomed.
Her worn hands instinctively traced the faint, almost invisible scar on her wrist, a memory of the day the alien ships descended on her quiet Earth town. Eleven years had passed, each one sharpening her resolve. Escape was a whisper in the dark, a desperate prayer, but it was also a meticulously crafted plan in her mind.
The heavy door hissed open, and the stern, unfeeling gaze of a Plutonian guard swept over the huddled humans. "Aria," a voice echoed, devoid of warmth. "You are summoned."
This was it. The moment she had both dreaded and yearned for.