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.