ER is an American medical drama television series about the inner life of the doctors and nurses of fictional County General Hospital in Chicago, Illinois. In season 13, with Kovac in Croatia, the focus shifts to Abby as she adapts to life as a single parent. Meanwhile new ER chief Kevin Morretti continues to make his presence felt until he makes a swift exit, Pratt is angered when locum Dr. Wexler is appointed as Morretti’s replacement, Sam and Gates start a relationship and Jeanie Boulet makes a return to the ER when her son is brought in.