This is the story of a bunch of valiant firefighters that risk their own lives on a daily basis to save the citizens of Chicago. After they lost a partner, two of the best men on the team started blaming each other for his passing, and instead of joining forces, they fractured the team spirit. Still, they've got a job to do, and in order to be successful, they'll need to deliver their A-game. Somewhere along the way, the team heals itself and the brave men and women turn into one of the best units in the whole country. In this line of work, you gotta treat your partners as family members; otherwise, everything will break down and you'll start losing lives.