In 1944, in a Spain impoverished and almost annihilated by the Civil War, Manuela and Candela are two completely different sisters who live in a little town deep in Galicia. Manuela only wants to live in peace and heal her sick little daughter Alba, but her younger sister Candela steals little amounts of the wolfram (a mineral used in World War II for tanks and fire weapons) she extracts in a mine to sell it on the black market, trying to get money. She also helps Bryan, an English agent of British Intelligence living secretly in the town, in an attempt to close the mine used by the Germans with General Franco's permission, to move all the wolfram they can to Germany, to expand their weaponry. Manuela reluctantly collaborates with Candela to contact a former guerrilla, Miguel Peña, to organize the mine workers (all them Franco's prisoners from the Civil War, condemned to penal servitude to avoid being executed) to dig a secret tunnel to steal the wolfram, but their plans turn more complicated when Candela starts to help fugitive Jews get to Portugal to impress young Englishman Edgar; and Franz, German supervisor of the mine, shows a love interest in Manuela, stirring up jealousy in Miguel. Can the two sisters stop the Germans before Franz realizes that Manuela and Candela are double agents?
—Chockys