While traveling in continental Europe, a rich young playgirl realizes that an elderly lady seems to have disappeared from the train.
       Passenger on a scheduled train out of the mountainous European country of Mandrika are delayed by a day due to an avalanche, and thus get up close and peronal with each other out of necessity in the only and what becomes an overcrowded inn in the area. Once the train departs, the one peron who it is uncertain is on the train is a middle aged English governess named Miss Froy. Iris Henderon, who was vacationing in Mandrika with girlfriends before heading back to England to get married, is certain that Miss Froy was on the train as they were in the same compartment and they had tea together in the dining car, but all those people who can corroborate her story don't seem to want to do so. Iris' thoughts are easily dismissed as a possible concussion as Iris was hit over the head just before boarding the train. Iris will take anyone's help in finding Miss Froy, even that of an Englishman named Gilbert, a musicologist with who she had a not so pleasant encounter at the inn the evening ...