a Manuel Cristóbal production ; Perro Verde Films ; Elephant in the Black Box ; Cromosoma ; Televisión de Galicia ; producers, Manuel Cristóbal, Oriol Ivern, Enrique Aguirrezabala ; script by Ángel de La Cruz, Paco Roca, Ignacio Ferreras, Rosanna Cecchini ; directed by Ignacio Ferreras