Demon Inside is a 2013 Spanish-language Horror Thriller motion picture written by Carlos Esteban Orozco, Juan Felipe Orozco and Alfonso Pineda Ulloa. The movie is directed by Alfonso Pineda Ulloa. Marta used to be a recognized and successful psychic, but after a dramatic experience, she loses faith in her gift and develops agoraphobia.. Demon inside features Paz Vega in the title role along with an ensemble cast including Johanna Murillo, Alfonso Herrera, Maya Zapata, Gala Montes, María De Orduña and Yolanda Corrales. It was released on 1st November 2013.