Garfield Lynns, the Firefly, is one of the Black Mask's highest-ranking soldiers. But Black Mask has underestimated Lynn's pyromania, as his obsession with seeing Gotham burn overtakes everything. By spreading chemical charges like those Black Mask implanted into the criminals he broke out of Arkham in people throughout the city, he's begun a wave of random, spontaneous human combustion.

Batman and Robin are able to track the computer signal setting off the charges without much difficulty, but the timely intervention of Mr. Zsasz prevents the dynamic duo from apprehending Black Mask. And in the chaos, Hush manages to escape from Batman's custody only to go into hiding in one place that Batman can't touch him.