During WWII a troop train is stuck at a small railway station. A young lieutenant gets close to a local girl, then the war separates them. Twenty years later he happens to arrive at the same station and finds out that she'd waited for him for many years.
Mr. Fortescue, owner of a big company, unexpectedly dies. The autopsy shows that he has been poisoned. Nobody actually loved him, and even his family members had their reasons to kill him. But who really did it? And who is responsable for killing his young servant and his wife within the next couple of days? Of course the only person who can answer this question is Ms. Marple. And of course, the murderer is the person you least expected it to be.
The events that are crucial to the fate of the heroes take place during one night shift at one of the country's largest construction sites.
