Martin Sheen stars in this psychological thriller about a Manhattan psychiatrist whose life takes a sinister turn when he discovers that a dangerous cult—rooted in brujería traditions and willing to commit unspeakable acts—has fixated on his young son. Directed by John Schlesinger and featuring Helen Shaver and Harley Cross, the film explores the intersection of psychiatric expertise and occult terror. A gripping 1987 examination of how darkness can infiltrate even the most protected lives.