Lara cracked the door ajar and peeked out. She took a last look at the man and chuckled when she saw how his mask was wrapped around his neck loosely. She closed the door behind her and stepped out.

The few sconces that lit the corridor had dimmed, producing only a dull light that lined the hall. She waited for a sound, anything, to caution her, but heard nothing — only the rhythmic drumbeat of her panicked breath. She glanced left and right, and when she saw that was alone, she scurried down the walkway. At its end, she found a deep stairwell leading down. A sense of foreboding hit...