A desperate mother and father attempt to cure their eight-year-old son's brain tumor by enlisting the help of a shamanistic healer; when the ritual results in the child being possessed by an ancient demon, the father must now face his own demons and return to his role as a former priest in order to save his son's soul and to protect humanity from the Evil that he has unleashed.

Alex é um garoto de oito anos que possui um tumor no cérebro. Mas após os tratamentos tradicionais não darem resultado, seus pais recorrem a alguns métodos alternativos que fazem com que a criança seja possuída por uma entidade demoníaca.