Mentally unstable, nightmare-plagued recluse Carlos becomes obsessed with his beautiful neighbor Berta. He also has a seemingly normal greenhouse where strange things happen inside.

Adapted from the novel by Juan Marse, the film shows two distant worlds in the Spain of the 50's, the suburban and the bourgeois, which are related through two characters, Manolo Reyes, vulgar motorcycle thief who aspires to escape poverty and Teresa Serrat, university student of bourgeois extraction seduced by the revolutionary cause.