In 1925 London, medium Gloria Sutter makes her fortune helping the bereaved contact loved ones killed during the Great War. When she is murdered at one of her own séances, after leaving a message requesting the help of her former friend and rival, Ellie Winter, Ellie must delve into Gloria's secrets and uncover the mysteries of her life and death while being tormented by nightmarish visions that herald the grisly murders of those in Gloria's circle.