The usurer Anselmo García has kicked the Countess of Alloro out of his farmhouse, and refuses to give him money for his jewelry, so the Countess offers his daughter to marry him.

El Algarrobo's niece is going to marry a rich young man, so they have to put on a comedy for the groom's family. El Algarrobo becomes an Indian uncle, El Estudiante falls in love with his girlfriend and Curro takes advantage of the farce to rob a jewelry auction.

A brother-in-law of El Gitano is mysteriously murdered and a crescent moon is engraved on his temple. Other victims also appear with the same mark. Curro finds a young woman who is also following in the footsteps of the man from the Media Luna.

The violent death of a great landowner and philanthropist casts doubts on Natalia, his young and beautiful widow. Curro Jiménez accidentally meets the son of the deceased and becomes his friend, starting to investigate.

A young man, son of a doctor, trained in liberal ideas, decides to imitate Curro Jimenez to implement justice, for this reason he kidnaps the owner of a mine that cruelly exploits the miners. At the doctor's request, Curro Jimenez must intervene to teach a lesson to his imitator and to a young miner who accompanies him in his adventure.