The Vanishing Aboard the Aurelia — the Volkov file

The chief steward logged every first-class passenger to a cabin on the promenade deck. Then the lights dimmed for the captain's toast, and a diamond brooch vanished mid-ocean. The log is torn. Restore it, cabin by cabin. 5 passengers, 5 cabins, and no two accounts that quite agree — start with Maxim Volkov.