John Devlin

The film

In 1871, professional gambler John Devlin elopes with Sandra "Sandy" Poli, daughter of Marko Poli, an immigrant who has risen to railroad tycoon. Sandy, knowing that the railroad is to be extended into Dakota, plans to use their $20,000 nest egg to buy land options to sell to the railroad at a profit. On the stage trip to Ft. Abercrombie, their fellow passengers are Jim Bender and Bigtree Collins, who practically own the town of Fargo and Devlin is aware that they are prepared to protect the little empire... trying to drive out the farmers by burning their property, destroying their wheat, and blaming the devastation on the Indians. Continuing their journey north on the river aboard the "River Bird', Sandy and John meet Captain Bounce, an irascible old seafarer. Two of Bendender's henchmen, Slagin and Carp, board the boat and relieve John of his $20,000 at gunpoint. Captain Bounce, chasing the robber's dinghy..

Synopsis from TMDB.