Bill Black is a scary guy: a tall ex-con who rides to work on a Harley and trails an air of violence wherever he goes. In Macon, Georgia, Bill has caught the eye of a wiry little drug dealer and his cunning girlfriend. They think Bill might be a useful ally. They don't know that Bill is actually a Georgia Bureau of Investigation agent named Will Trent. Or that he is fighting his own demons, undercover and cut off from the support of Sara Linton -- the woman he loves, who cannot be told of the risk Will is taking.