A grandfather and grandson are injured in a chainsaw accident, leaving Luka stuck upstairs with one of them in a difficult case. Pratt has his trial-by-fire when he has to handle the ER alone, juggling multiple traumas, teaching duties and a troublesome intern. Neela mentors a new med student, and lends a hand when Pratt makes a serious error. Abby enrolls in a "Mommy and Me" class, but it's not all fun and games.

Luka gets some important news, and at the end of the day, an unexpected visitor. A collision between a motorcycle and a car brings critical patients to the ER. Luka and Ray treat the motorcycle rider, and discover a condition his wife wants kept secret. Abby and Neela work on the driver of the car, but his surgery doesn't go well and his wife soon has troubles of her own. Pratt has a new lady in his life, and a new roommate, while Gates has a different kind of girl-trouble. The women of the ER take some time for stress relief.