The crew is assigned their first ever female firefighter, Lucy, sending the firehouse into a gender confused tailspin. When Chief puts the clamp on rookie hazing, the guys try to engage in their old traditions anyway only to find that Lucy is a force to be reckoned with.
In a firehouse in one of America's rainiest cities that is light on blazes that need extinguishing, its crew keeps themselves entertained with creative competitions, friendly first responder rivalries, and bizarre emergency calls.