
As the firefighters, rescue squad and paramedics of Chicago Firehouse 51 forge headfirst into danger, the choices they make can mean the difference between life and death. But from the relentless pressure of saving lives, an extended family is forged. When it's go time, Firehouse 51 lays it all on the line for each other. This high-octane drama from Executive Producer Dick Wolf offers an edge-of-your-seat view into the lives of everyday heroes committed to one of America's noblest professions.

Mouch offers to help when an off-duty incident puts Cruz in a bad spot; Casey takes on a powerful politician; Lt. Severide makes life difficult for a new team member; Dawson gets an unexpected visit from her father.

A warehouse blaze puts the fire and rescue squad at risk; Dawson's father overstays his welcome at Dawson and Casey's home; Casey fights for his first responders bill; Mouch makes a serious decision; Herrmann tries to make a young boy smile.

Chief Boden makes a risky last-minute decision to save his men; Dawson continues to deal with her father; Brett's childhood friend visits and catches the attention of someone within the firehouse; a fire at a high school hits close to home for Boden.

Chief Boden turns up the pressure on Severide and Casey to investigate the cause of the fire that trapped his wife; Mouch is over-competitive in the firefighter muster challenge.