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

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

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:

As the train winds toward the karst mountains of Guilin, you realize the iron key fits a vintage locker in the very back of the caboose. Inside lies a map of a "Ghost Line"—a series of tracks that don't appear on any modern grid, leading to a village that was supposedly erased from history fifty years ago.

: 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.

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?