In a small laboratory of clinical analysis a psychopath (Rafael Colatino) receives the visit of a religious fanatic pastor (Daniel Melo) that induces him to follow the "path of faith in exchange for a small amount." Originally filmed in February 2006, this short film became the first one performed by Costa Livre Filmes, "The Sadist of the Laboratory" makes use of a simple script, alluding to the classics of horror Gore "B" class of different times.A gift for fans of the genre .