Twenty-year-old Luz, an Argentinian, is on holiday in Madrid with her husband and new-born son. But secretly she has a mission, to find her real father. Carlos was a 'desaparecido', one of the many political activists in Argentina who literally 'disappeared' during its brutal military dictatorship in the seventies, while her mother, a political prisoner, was killed trying to flee the country. The newly born Luz was secretly adopted by a wealthy couple, unaware of her true origins. Only three people know Luz's real identity, Eduardo, her adoptive father, racked by guilt at this deception; the powerful and corrupt General Alfonso, her grandfather, determined to keep the secret buried; and Miriam, the prostitute who befriended Luz's real mother in her final days and who returns from exile determined to tell Luz the truth.