Doctor and researcher, Guillaume Duchenne de Boulogne, became obsessed with smiles. His electrical experiments allowed him to conclude that a truly happy smile is formed not on-ly by the use of the muscles of the mouth but also by those of the eyes. That kind of smile is called a Duchenne smile. Many researchers have suggested that the Duchenne smile indicates spontaneous and ge-nuine emotion since most people cannot contract the orbicularis muscle at will. 'Duchenne's Smile' is a psychological horror thriller that addresses the traumas of those who, in the abandonment of their own mind, can only glimpse at their dark past.