Wolf Boykins returns to lead the fire station choir, the Ex-SING-guishers. Eddie teases Granny for joining the group but soon finds himself vying for a spot as the lead whistler. Lucy, meanwhile, convinces Chief to let her look for a more female-friendly uniform.
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.