Five young and ambitious rookie cops continue to navigate the emotional trials and tribulations of their professional and personal lives. Last summer these rookies hit the streets for the first time with their training officers and learned how to walk the thin blue line. Now the training wheels are off -- more experienced, they're ready to kick some serious butt. But these rookies are just beginning to realize there are no shortcuts to becoming good at this job. And when you're a rookie officer, a little knowledge is a dangerous thing.