A suspicious fire on Halloween floods the E.R. with many bizarrely costumed victims -- frustrating Dr. Pratt -- while a frustrated Dr. Romano lets his recent traumatic injury interfere with good judgment when he directs Dr. Corday during surgery on a man with a flesh-eating infection. Elsewhere, Nurse Marquez threatens to file a grievance against Dr. Kovac, who must also treat an older mother who won't accept that her newborn baby cannot survive while Abby and Dr. Carter playfully dress up in suggestive seasonal costumes. In addition, the staff greets an older but wiser surgical intern who tries to overcome a daunting physical handicap.