Action Santos is one of the most structurally rigorous collaborations of director Pere Portabella and composer Carles Santos. After an opening montage of preparatory gestures - which evokes Portabella's earlier Nocturno 29 (1968) as well as silent cinema - the film dialectically contrasts a performance by Santos of a piano piece by Frédéric Chopin with an equally long shot of Santos silently listening to his recording.