Trapped on a deserted subway and stalked by a slimy creature, Sarah narrowly escapes but becomes obsessed with finding answers. Her descent back into the dark tunnels leads her to a hidden chamber, where ancient frescoes whisper of forgotten rituals and sacrifices. In the center lies a pulsing circle of obsidian stones, drawing her in with an unearthly light. As she crosses the threshold, the stones flare, banishing the lurking monster and revealing a terrifying glimpse of the city's dark past. Forever changed, Sarah emerges from the darkness not just a survivor, but a guardian against the secrets that pulse beneath the city's skin. Her journey into the unknown, fueled by newfound knowledge and grim vigilance, has just begun.