Hawkeye's picnic date with new nurse Lieutenant Marquette (Teri Garr) is interrupted by gunshots from a sniper.
The couple quickly heads back to the camp, where everyone but Radar and Colonel Blake, who are pinned down in the showers, shelters in the main hospital building.
Eventually Radar and the Colonel join the staff in the hospital building and they manage to treat casualties which soon arrive.
Help from headquarters is not immediately forthcoming, and Frank's attempts to be "a real man" (encouraged by Margaret) leads him and Hawkeye to ambush a figure in the mess tent, who turns out to be Radar, desperate for food.
Frank Burns discusses his medical training with Hawkeye, noting it took him "twice as long" as the usual time to qualify, and that he "flunked out of two med schools".