Two obsessed NYPD detectives hunt for a vicious butcher called the Angel Killer, a sociopath who preys on the innocent family members of known murderers in order to "e;purify"e; the rest of society. From comics super team **PETER J. TOMASI **(**THE MIGHTY, _Batman and Robin_**,** _Superman_**, _Black Adam: The Dark Age_**,** _Super-Sons_**,** Detective Comics) **and** MAXIM A IMIA **(**_Escape from New York_**,** _Conan_) comes a story that confronts the battle of nature versus nurture, considers how present and future generations are tainted by past generations, and asks the age-old question: Who must pay for the sins of the fathers-and perhaps even the sins of the mothers? **Collects BLOOD TREE #1-6**