Cecily Harrington's fiance is traveling in the Sudan, when she wins a big prize in a sweepstake and decides to postpone the wedding to spend a portion of the money on a European trip. During her travels, she meets Bruce Lovell, who sweeps the romance-craving Cecily off her feet, marries her, and takes her to his out-of-the-way cottage in the country. However, Lovell is not the charming gentleman he appears to be. Instead, he is a homicidal maniac of the most eerie, repulsive type, and is resolved to murder his new wife, just as he has murdered several other women before her. When a series of circumstances leads Cecily to realize the ghastly fact, she finds herself caught like a rat in a trap, unsure of how she will escape...

A highly influential British thriller set aboard a speeding train with a host of mysterious passengers, a hotbed of intrigue, crooks, blackmail victims, good guys and bad girls in every carriage. Films like 'Murder on the Orient Express' and 'The Lady Vanishes' owe much in style to this early British film and it was remade as 'Sleeping Car to Trieste' in 1948.