Magnus "Steps" Craig is part of the elite three-man Special Tracking Unit of the FBI. Called in on special cases where his skills are particularly needed, he works as a tracker. The media dubs him "The Human Bloodhound", since Steps is renowned for his incredible ability to find and follow trails over any surface better than anyone else. But there's a secret to his success. Steps has a special ability - a kind of synesthesia - where he can see the "essence" of a person, something he calls "shine", on everything they've touched.