Season Four continues the story of Claire and Jamie Fraser as they try to make a home for themselves in colonial America. The Frasers in North Carolina are at another turning point in history, the edge of the American Revolution. Along the way, the Frasers cross paths with notorious pirate Stephen Bonnet in a fateful meeting that will haunt the family. Meanwhile, Brianna and Roger grow closer in the twentieth century but make a shocking discovery...

Nelly, a happily-married mother and schoolteacher, is haunted by her past. Her memories, provoked by remorse and guilt, take us back in time to follow the story of her relationship with Charles Dickens with whom she discovered an exciting but fragile complicity.