Tom Layman, his wife and the family dog are shot dead without motive, only young daughter Grace escaped by hiding. Their ex-con gardener is only guilty of a petty theft. A neighbor however seemingly went mad and is taken down by SWAT. His fury was actually manipulated by implanting radio-active pallets, custom-made for uncooperative surgeon William Byrne. The whole thing bares the 'poetic justice'-akin signature of the brilliantly deranged serial killer Dr. Jekyll. Following his trace proves physically dangerous.