It's been two years on the job, and the rookies of 15 Division are well on their way to being experienced cops. They've wanted to shoot guns, and help people, catch bad guys, and toughen up in every way; and they have. But at what cost? What is the price of doing this kind of job, both professionally and personally? How do you stay true to yourself -- how do you maintain your individuality and compassion -- when this is what you do for a living? Last season, the training wheels came off and the rookies proved that they could handle the job. Now they're learning that experience isn't everything... and that the boundaries between who they are as cops and who they are as people is not as black and white as they once believed.