In the early 1900s a small city near Boston is famous for being the largest leather manufacturing area in the world. But as the century progresses it's becoming known for something it can't live with – the multiple murders of innocent teenage girls over a period of 60 years. Some of the girls are viciously molested, others brutally strangled, and most are deposited in the same location, near midtown, in a narrow, factory-polluted river. Is there a reason? Is there a message? One intelligent investigator spends much of his career hunting for the answers.