When Katie Sue Perrywinkle walks into the Little Shop of Potions, Carly is surprised and delighted to see her old childhood friend. But Katie Sue's not back for a social visit. She's come to settle a score with Senator Warren Calhoun, who is in town for his son's high-profile wedding. Before Katie Sue has a chance to voice any objections, she's forced to forever hold her peace. Carly vows to find her murderer, but as Carly gets closer to the truth, a killer is planning a very chilly reception.