Detroit private investigator Amos Walker, who recently got his first cell phone, is hired for a twenty-first-century job recovering stolen HDTV converter boxes. But before long, the case turns old school: both a suspect and the man who lost the boxes are murdered, and Walker ends up working with both the local police and the feds. The boxes were being used to smuggle high-grade heroin that's killing off junkies left and right, and it's up to Walker to track down the missing dope. Soon old friends and older enemies begin to resurface.