Feature film located at the beginning of the 20th-century which tells the story of the town "La Esperanza", whose dying mining boom receives a fatal blow.

María lost her husband in the cristero civil war. Her son Benito and a spanish priest are her only support. The loss of a minor puts María on alert.

Lu has a perfect life. Or so she pretends to have. She meets the handsome, short-tempered Argentinian, Diego, who is on a visit to Mexico, and she is confident to get him head over heels in love with her. In order to win a wager with her friends, her life will take a turn when she does the impossible to win him over, including taking a trip to Argentina to look for him.