Roger, Tim, Evan and Sarah are on their way to a medical conference in Palm Springs when they are suddenly involved in a serious road accident on a bridge. An ambulance, an empty bus and some other cars are also involved. Everyone seems to be alright but Sarah, who was driving, is stuck behind the wheel. While Evan attends to her, Roger and Tim look after the other injured victims. Vinny, a guy from the ambulance, is getting much worse. Roger tries to get one of the less injured crash victims, Burt, to help out but Burt is not the helpful type. Instead he lights a cigarette - causing the ambulance to go up in the air in a giant explosion. Vinny suffers cardiac arrest and thanks to traffic jam, it's impossible to get him to a hospital. Roger rushes to pharmacy to get some adrenalin but gets into major problems when he is unable to pay. Meanwhile, Sarah starts to get weaker. She can't feel her legs and she has internal bleedings. Roger finally manages to get the supplies he need and retu