Once Upon a Time in Deadwood

A beautiful heiress finds notorious gunslinger and Civil War hero 'The Colonel' and offers him a proposition he cannot refuse. Her sister has been kidnapped by hoodlums and will be sold into prostitution.

The heiress tells the Colonel she has slipped a slow-acting poison into the food he just ate. He has three days to track down and rescue her sister, who holds the antidote.