Saint is a private investigator of dubious character. He will take almost any case, but his favorite includes entrapping married women into infidelity. Saint is hired to keep a watchful eye on Grace while keeping his identity a secret. The paradox tempts him; is Grace, a devil in disguise or an angel with a crooked halo? When he finds himself in a compromising position, Saint quits. He soon regrets resigning when he discovers a sinister threat to her safety, and it may be the reason for the nightmares.