Based on a true story. The name of the real ship, that sunk Feb 5 1941 - during WWII - was S/S Politician. Having left Liverpool two days earlier, heading for Jamaica, it sank outside Eriskay, The Outer Hebrides, Scotland, in bad weather, containing 250,000 bottles of whisky. The locals gathered as many bottles as they could, before the proper authorities arrived, and even today, bottles are found in the sand or in the sea every other year.

Travellers on a trans-European train are delayed for a night due to bad weather in a small fictional country called Mandrika. The passengers cram into the small village hotel where socialite Iris Henderson meets an old governess called Miss Froy. Shortly after the journey restarts, Miss Froy disappears.