07 - Man Who Fell Through the Earth by Carolyn Wells

Step into the shoes of a lawyer, as he stumbles upon a mysterious scene on leaving his office - an apparent fight and a gunshot from across the hall. To his surprise, there is no trace of a victim or perpetrator, despite the impossibility of anyone leaving without being noticed. A banker has been murdered. But who is the culprit? A colleague, the banker’s enchanting ward, or an enigmatic woman who visited the office earlier? And what role does the amnesiac man rescued from the river play, a man whose first memory is a disconcerting fall through the earth? Join us as we unravel this perplexing mystery. (Summary by Richard Kilmer)