The lovely Maggie MacGregor resists her arranged marriage to the old frontiersman Cluny, a match coordinated by her father. It is common knowledge that Maggie and young Colin Shaw are in love. On the eve of their wedding, Shaw makes a scene at the fort's tavern, and asserts that Cluny is already in a relationship with Oussita, a Native American woman, causing a scandal. The next day, Cluny is shot and paralyzed. While everybody suspects Shaw, Jonathan Banner and Pierre Falcon investigate the event and discover that it was a disgruntled Native American (Oussita). Cluny decides to marry his true love, Oussita, leaving Maggie free to marry Shaw.
Banner must deal with a romantic quadrangle - Colin Shaw lover Maggie MacGregor who is engaged to Maitland, an up-and-coming Hudson's Bay factor. Jack Cherry only wants to marry Maggie.
Jonathan Banner discovers American soldiers on an expedition to find the source of the Mississippi River, which they hope is the natural border between the U.S. and Canada. Disappointed that it is not, a fight ensues over what should be the border, but Banner's party and the soldiers settle their...
Jonathan Banner and Pierre Falcon are sent on a special assignment from Fort Gannon to meet with Standing Bear. When the arrive, they meet Standing Bear's "adopted" daughter, blonde-haired blue-eyed Lucy Shepherd, who was orphaned at a young age and has grown up in the tribe, knowing nothing else...
