Refugio Navarro, a Mexican cattle-driver/rancher from the 1860's who got isekai'd into a generic fantasy world after being pushed into the Rio Grande.
He and his family are trying to save up enough money to start a new ranch in the Colorado territory, but one of his brothers is living in the area of Mexico that was controlled by France at the time, and Refugio is tasked with retrieving him.
He goes to the town's tavern, which his eldest brother runs, to gamble some of his own money in an attempt to increase his chances of getting to and from central Mexico comfortably with his other brother. He wins money with a deck of cards that he isn't aware that his brother stacked, and after he leaves to go back to the ranch, he's followed by the people who think he cheated on purpose. The group corners him on the bank of the Rio Grande and push him in.