In this provocative drama series, four couples dare to defy societal norms by engaging in a swingers' game, where they explore their deepest desires and confront their innermost secrets. As they delve into the world of non-monogamy, they must confront the consequences of their actions and the true nature of their relationships. Will they discover their true selves or will they succumb to the pressures of tradition? 'El juego de las llaves' is a thrilling journey into the taboo world of swinging.

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Some TV shows that have similar genres and were produced around the same time as El juego de las llaves include Lessons in Chemistry, Chernobyl, Mad Men, Shardlake, Normal People, Nashville.