An explosion during a high school science class floods the ER with a variety of burned, gassed and broken patients. Dr. Greene rescues Dr. Carter from one student's irate father. Hathaway urges a young pregnant waitress to enter a drug rehabilitation program while Lucy also pleads with an artistic painter to do the same. Dr. Benton tries to protect a young man who learns he's HIV-positive while donating blood for his injured brother. Carter wonders if he's gotten the final brushoff from Elaine. Jeanie is distracted at work over her young adopted son's wheezing back at home. An inquisitive Malucci courts trouble when he solicits information about Dr. Weaver's disabled leg.