Madeline Mona Moon is not your typical young lady. She is a cartographer by trade, explorer by nature, and adventurer by heart.

She has inherited a fortune from her uncle and is one of the richest women during the Depression. But there's a problem. Miss Mona is bored. So she underwrites an expedition to find lost Native American silver mines in Eastern Kentucky. As a condition of underwriting the search, Mona gets to tag along, but soon discovers the expedition has a nefarious purpose. Mona finds herself lost in the Appalachian Mountains with only her wits to save her, but like the panthers roaming the mountain ridges, she is swift, silent, and deadly.
That's how Mona does things in 1933.