An ecologist from Germany and her filmmaker daughter who lives in Argentina meet in Cuba to film a documentary on snails. The mother has worked for years helping her colleagues in Cuba protect the polymita picta snails, which are facing extinction. She has her own ideas on how to make the documentary and the daughter follows her lead. However, when the authorities ban the shooting, the course of the film changes: it is no longer about the snails, but they themselves become the protagonists.

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