The clue's the thing!
Madeleine Van Norman is a beautiful young heiress who is soon to inherit a fortune. From her countless suitors, she makes a baffling choice, choosing to marry a stiff and stuffy man who is in love with someone else. On the eve of the wedding, Madeleine shuts herself away in a locked room to think – but in the morning, she is found gruesomely murdered.
Every member of the household is now a suspect, but first to be answered is the question of how the murderer got in and out of the locked bedroom! It's now up to detective Fleming Stone to finger the murderer – a seemingly impossible mystery that hinges on a single, vital clue.