It’s 1863 and 12-year-old Martha Jane and her family are headed West across the United States in search of a better life. After her father is hurt in a serious accident, she takes charge of her siblings and learns to drive the family wagon. Utterly practical and bold, Martha Jane trades her constricting skirts for the ease of boys’ breeches and never looks back. Her unconventional style and brazenness don’t sit well with the pioneer community, and when the leader of the convoy wrongly accuses her of theft, she must run away to find proof of her innocence. In the Wild, she discovers herself and a world which shapes her into the mythical and mysterious Calamity Jane.