As Detective Harvey Havoc and his partner, Shay Smith, are adjusting to their new relationship, a misguided Motor City resident is heading down a path of darkness and death. After a rash of seemingly unrelated deaths are linked together, their focus shifts. Could one person be responsible for all of these killings? Or are they just the sad toll of a superdrug gone rampant? Soon, Harvey and Shay find themselves not only fighting for the truth, but also struggling with the politics of an impossibly backward justice system. When a friend gets caught up in the killings, the pair become desperate for answers. Time is running out for Harvey and Shay to catch The Shifting Slayer.