The eleventh Jack Taggart Mystery pits Taggart against the ruthless new leader of the Satans Wrath Motorcycle Gang. After the new leader of the Satans Wrath Motorcycle Club ordered the murder and torture of three people — one who was wrongly suspected of being an informant — a bloody message painted on the wall at the murder scene is personally addressed to Jack Taggart. Horrified by the discovery, Taggart’s shock turns to rage when the bikers’ next stop is to his home. When a new assistant commissioner orders Taggart to stay clear of the bikers, Taggart forms a deadly plan of vengeance to deliver justice as only he could.