Widowed police psychiatrist (Martin Sheen) and his young son (Harley Cross) move to NYC and get involved with a cult that believes in human sacrifices--small children especially.
Exceptionally well-made, deadly serious horror film is not for everybody. It's way too long, has some very disturbing scenes (quick closeups of a dead child's mutilated body; animal sacrifice) and it's serious tone can wear one down. Still, it's a complex, one of a kind horror film. Name all the major studio films that deal with cults, voodoo and children sacrifices--there aren't any! It's surprising this even got made.
Sheen is very good as the father, Cross is exceptional as his son. Also Robert Loggia turns in strong support as a police chief. The only bad acting is by Helen Shaver as a landlady who Sheen falls for (for some reason). Also there's a pretty needless ending.
All in all though, a good horror film, but remember--it's STRONG stuff!