When Marla Holland falls to her death on the stairs of the Foxglove Corners Public Library, nobody realizes that she has been poisoned. In her life, Marla antagonized several people, including Jennet Greenway on the night of her murder, but which one of her enemies killed her?

Distracted by a battle to save Marla’s collie from will-ordered euthanasia and a Halloween prankster who threatens Jennet and her dog, Jennet doesn’t realize that she is in line to become the killer’s next victim.