Jennie is a twelve-year-old girl living with her parents in extremely rural mountain country. Her schoolteacher, Miss Carol, though a mountain girl herself, has gone off to be educated and returned in hopes of stopping the tradition of child marriage which permeates the culture. Jennie's father Ira is a good man who tries to protect Miss Carol from the men who threaten her if she doesn't call off her crusade. One of these men, Jake Bolby, has his eye on little Jennie and plots to make her his bride.

A San Francisco airplane bound for South America crashes, and among the scorched debris is found a shrunken native human head, neatly packaged. The perplexed police contact a local anthropology museum about this unclaimed piece of grisly baggage, where they intersect with Jack and Doc, two private eyes, called there to meet a mysterious woman who had a case for them and wanted to meet in private.