Marple is asked by her lawyer, Christian Gilbranson, to visit his step-mother, Carrie Louise Serrocold, an old friend of Miss Marple's, at her country estate. Carrie's husband, Lewis, confides to Miss Marple that he suspects someone is slowly poisoning his wife, and when Gilbranson visits the mansion, he is mysteriously murdered.
Middle-aged Max and Sara meet and fall for each other in Palm Springs, but their love story is cut short due to a sudden zombie outbreak. Max is not as mild-mannered as he appears, and has a history involving government-sanctioned hits, but one zombie he isn't able to kill is his darling Sara.