The series tells about the most difficult and dangerous work of firefighters and rescuers of the Chicago branch of Firehouse 51. Despite the everyday heroism of men and women, their great dedication leads to personal losses. The main character, Matthew Casey, a born leader and a true firefighter.
However, a breakup with a girl forces him to take a fresh look at many things. In addition, Casey is always in confrontation with another member of his team - Lt..