Daniel Harms refers to himself as an independent contractor, one with a special skill. He earns a very good living by making people die. He has a reputation for dependability and efficiency. He is the Mob's go-to guy when they need an outsider, and has even done occasional jobs for the federal government. Harms' identity is a mystery to everyone who has ever hired him. The firewall between his professional and personal lives is absolute, and he has developed rules over the years—he thinks of them as his rules of engagement—to guarantee that the firewall will never crack.