: Talk to a cast of fully voiced characters—the nervous student, the retired general, and the wandering monk. Your dialogue choices determine who trusts you with their story.

As the train pulls out of the bustling station in Harbin, you settle into your compartment. Your goal is simple: document the changing landscape of China, from the frozen northern borders to the humid tea terraces of the south. But as you look through your camera lens, you notice things the other passengers don't:

: Trade local snacks and tea with passengers to gain access to restricted areas of the train. The Mystery of the Iron Key

Will you pull the emergency brake and stay on the path of safety, or will you follow the tracks into the heart of the fog?

: A mysterious shipment in the cargo hold that hums with a low, rhythmic vibration.

: Cryptic messages slipped under your door at every provincial stop. Gameplay Mechanics

The rhythmic clack-clack of the tracks was the only sound in the sleeper carriage as the cut through the thick morning mist. You are Wei, a freelance photographer who just inherited an old, heavy iron key and a single, unpunched train ticket from a grandfather you barely knew.

: Use your vintage camera to "capture" clues. Developing photos in the train's makeshift darkroom reveals hidden messages or ghostly figures.