Edward Hyde has a strange gift he keeps secret from all but his physician: He experiences two realities, one real, the other a dreamworld state brought on by a neurological condition. When murders in Victorian Edinburgh echo the ancient Celtic threefold death ritual, Hyde hunts for those responsible. The killers are there to be found, not just in the real world but in the sinister symbolism of Edward Hyde's otherworld, a story that inspires Hyde's friend, Robert Louis Stevenson.