Antes de que lleguen los invitados a la boda de Delfina, ella y sus dos amigas del alma van a la estancia familiar para pasar un día juntas. Enredos y conflictos femeninos en la joven aristocracia porteña.

Marcos is an experienced nurse. He works in the night shift of a provincial private clinic. He is applied and professional but has a secret: in some extreme cases he applies euthanasia. He'll soon meet someone that knows what he's doing.

A group of boys and girls settle in a country house. One of them writes a novel while the others try to become a gang and prepare a robbery: some fall in love, or seems to be, or believe they are in love. However, these two, three, ten plot lines unfold from what the characters hide or just don’t know. With a sense of humor and play that is both the characters’ and the film’s, They All Lie superimposes plot lines as if it were a tapestry from which a part is constantly hidden, revealing it later and changing its meaning.