The episode lays out the background of Richard Evonitz, including Kara's courageous escape from his apartment in 2002 which led authorities to him, and dives into unsolved cases—such as the 2002 Topeka double murder of Mike Sisco—to investigate whether his crimes extended further than the official record

Kara Robinson Chamberlain and serial killer Richard "Marc" Evonitz's ex-wife, Bonnie Lou, continue their investigation into Evonitz's past

Bonnie and Kara confront the final chapter of their investigation as survivors identify a notorious serial killer, investigators revisit his known victims, and the women reflect on their search for justice after decades of unanswered questions.