Eccentric millionaire Olivia sends her half sister Agatha, and a group of old acquaintances, a mysterious invitation for a weekend on her yacht, where they will discover the true motive…

Two men, an aging Native American and a ne’er-do-well trapper from North America, race to claim the stallion Eagle’s Wing in antebellum Mexico, meeting marauded stagecoach travelers and garrisoned Mexicans…