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 "purify" 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 ŠIMIC (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