Susan Herkimer Anderson wants more from her journalism career than county fair coverage and feature stories. Working for the Dakota County Alliance, she dreams of becoming an investigative reporter covering legislation and state politics that directly impact local communities.

When a mysterious diamond discovery in northern Minnesota captures statewide attention, Susan senses there is more to the story than a lucky geological find. Legislators are suddenly proposing that the famous Lake Superior agate be demoted as Minnesota’s official gemstone in favor of a newly named diamond called L’Etoile du Nord. But key details about the stone remain strangely unclear.

With encouragement from her supportive husband Len — an accountant and devoted rockhound — Susan begins asking difficult questions at the State Capitol. Her investigation uncovers inconsistencies surrounding the diamond’s origins, the legislators promoting it, and the possible financial motives behind the sudden publicity campaign.

As the mystery unfolds, Susan finds herself balancing career ambitions, ethical journalism, political pressure, and the realization that even small-town stories can expose much larger schemes. What begins as an odd local-interest piece gradually becomes a comedic political mystery involving mineral rights, lake property speculation, and a desperate attempt to transform Diamond Lake into a mining hotspot.

At its core, Mineral Mischief in Minnesota is both a love letter to Minnesota culture and a story about finding confidence, purpose, and courage in unexpected places.