Wyoming, 1868. Ambrosius Van Deer has come to Fort Laramie to meet Jess Chisum, a young man who claims he's found Van Deer's nephew Eddie. Ten years before, Edwyn Van Deer disappeared after his family was killed in a Lakota raid. Proof of his identity: a silver watch with a portrait of his parents. But fate has other plans than a happy family reunion, and the events of that day will set in motion a tragedy 15 years in the making.