Amy Brown Carver

When Joan discovers her sister has been possessed by a demonic entity, she has to enlist the help of the only remaining priest trained in exorcisms to help her overcome evil. They find themselves in a race against time to rid her sister of the demon before it can enter the world and wreak havoc.

Follows a young woman who discovers that her boyfriend is sleeping with her cousin Helen, and goes to confront them at a dinner party, only to find out that Helen is dead and everybody is a suspect.