Mudos testigos is a cinematographic collage made from all the surviving material of Colombian silent films, re-editing the images in such a way as to create a single imaginary film: the impossible love story of Efraín and Alicia that traces the convulsive first half of the twentieth century in Colombia. Compiled by the late Luis Ospina and finished posthumously by Jeronimo Atehortúa.

Sentimental and costumbrist drama. "Triumphant production of Colombia Films. Starring Italian actress Mara Meba. The beautiful landscapes that are admired are copied with taste of the charms of the Cauca land and the one of a group of seagulls in the Cauca river is a surprising effect and that much would like to have them the European movies". (Diario del Comercio Newspaper, August 26, 1926)

"The plot of the film, although it has no local color, as it would have been to our liking, is something very human that happens quite frequently in this century full of vanities, of a life of useless sacrifices to appear to have a wealth that one is far from possessing". (Diario del Comercio. August 25, 1926).

A young and beautiful woman is soon to be married. However, her plans are complicated by the attraction she begins to feel for the painter who paints her portrait, who is also a boxer.