Lost Souls is a dark and suspenseful thriller that explores the battle between spiritual forces. The story follows an exorcist who attempts to save a man who has been mark to be Satan's vessel, so that he can take human form. Winona Ryder and Ben Chaplin lead the cast and give solid performances. The film is very stylized and atmospheric, which helps it to maintain an air of suspense and a sense of foreboding. And while the material is fairly derivative, it does have some dark turns and twists that give the story some additional intrigue and edginess. Though it does have flaws, Lost Souls is a hauntingly chilling supernatural thriller.

This unholy spawn of The Exorcist out of Rosemary's Baby is dreary going indeed, even when it becomes unintentionally hilarious.