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Directed by Fernando (Belle Epoque) Trueba, the Spanish/ French Opera Prima stars Oscar Ladiore as a young divorced employee at a news agency. Outside the subway one evening, Ladione chances to meet his beautiful cousin, played by Paula Molina (sister of actress Angela Molina). The two commence an affair, then drift apart. Molina, an aspiring musician, falls under the spell of her pretentious tutor. On the verge of leaving the country with her teacher, she is "rescued" at the airport by Ladiore. The title's significance can be explained by its literal translation, "First Effort" (it is the first romance for Ladione after his marital breakup), and by the fact that "Opera" and "Prima" are slang terms for "Subway" and "Cousin," respectively.