When Department of Public Works employee Don Heller is found stabbed to death, the detectives suspect those responsible are the gang bangers he encountered earlier that day. However, the case takes a significant turn when Winters and Jarzuszalski discover that Heller was investigating a string of unsolved murders that were committed over the past decade. DDA's Dekker and Stanton must now seek justice for the innocent victims in hopes to erase the horror from the past.