At the end of the Spanish Civil War (1936-1939), some Republican fighters continue to harass the victors with guerrilla operations. One of the zones of resistance were the mountains of León. In the region of Riaño, half a dozen maquis maintain a very unequal fight against the Civil Guard. Ramiro, Santiago and Gildo, three militiamen, are persecuted by a patrol of the Benemérita under the control of a sergeant who is in love with the same woman that Ramiro. To get enough money to get them to France, the militiamen kidnap the owner of a mine and demand 150,000 pesetas in exchange for their freedom.