The Hidden Face is a thrilling mystery that follows the story of Adrián, a young orchestra conductor whose girlfriend Belén disappears without a trace. As he struggles to cope with her absence, he meets Fabiana, a beautiful camarera who moves into his house and becomes his new love interest. However, strange occurrences in the bathroom raise suspicions, and Fabiana discovers a soundproof secret room where Belén has been trapped all along. But just as Fabiana is about to rescue Belén, she hesitates, torn between her feelings for Adrián and her jealousy towards Belén. In the end, Belén escapes and leaves the house, but not before putting Fabiana in her place by locking her in the secret room. The film ends with Belén alone on the beach, while Fabiana remains trapped and awaiting rescue.

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Some movies that have similar genres and were produced around the same time as The Hidden Face include Source Code, The Guest, All Good Things, Lost River, Now You See Me, Zodiac.