Travelling by sleeper train, George and his wife Alice are not getting a wink of sleep because of the occupants of the next sleeper compartment playing their radio very loudly. Weary from tiredness, Alice decides to go and ask the perpetrators to turn it down. On arriving at their compartment, she overhears them talking about planning a robbery and murder, so she hurries back to George who sensibly tells her to mind her own business, and forbids her from telling anyone for fear of the repercussions...