Snow closes Blackglass Pass, and the Nocturne Express settles into a night of cocoa, music, and missing keepsakes. In 24 increasingly intricate cases, match five travelers to five train cars and five check-in windows. Use the conductor’s clues to reconstruct each route and find the recorded access lead—without mistaking opportunity for proof. Includes progressive hints, complete schedules, and a fair-play answer ledger. No outside knowledge required.