Carina DeLuca is an Italian paramedic and traumatologist who comes to the United States to show the American stations the benefits of having a PRT in their station. After a successful six months in New York and six months in Los Angeles, she and her team, composed of Amelia Shepherd and Gabriella Aurora, have to go to Seattle in the best fire station of the city for their next mission... the Station 19 whose captain Bishop has been imposed this collaboration against her will