The Mailbag Robbery

A gang of four would-be robbers plans to steal a fortune in currency hidden aboard the "Flying Scotsman" in a railroad stateroom by cutting through the wall of the adjacent stateroom, but find themselves up against numerous unexpected drawbacks, including interference by their fellow passengers. As they attempt to execute their audacious crime, the gang's meticulously planned heist quickly unravels due to their own ineptitude and the uncooperative train. The film takes a thrilling turn as the would-be robbers face a series of setbacks, leading to a suspenseful showdown with the authorities in London.