In Harris County, Sgt. Roger Wedgeworth investigates the gruesome murder of a homeless man found stabbed to death along Interstate 45. Without any witnesses or a motive, investigators race to find a suspect before the case goes cold. And in Louisville, Det. Scott Russ heads to a troubled housing project to investigate the murder of a young man--the prime suspect in a current double homicide case. Russ, faced with a community's unwavering policy of no snitching, must convince terrified witnesses to come forward and tell him what they know.