Subsuelo is an upcoming Spanish psychological thriller film directed by Fernando Franco based on the novel "" by . It stars Julia Martínez and Diego Garisa. Plot. Twin siblings Eva and Fabián, about to come of age, are involved in a tragic incident whose circumstances are seemingly known only by them and their mother Mabel. Production. Adapted by Begoña Arostegui and Fernando Franco, the screenplay is based on the novel "Subsuelo" by Marcelo Luján. Luján reportedly supervised several script revisions and attended the set "a couple of times". The film is a Lazona, Kowalski Films, Ferdydurke Films and Blizzard Films AIE production, with the participation of RTVE, EiTB, Canal Sur, and Movistar Plus+, funding from ICAA and backing from . The film was shot in between the Madrid region, Biscay, and the province of Segovia. Santiago Racaj worked as cinematographer.