A flock of bats lead Yin and Bennett to Wayne Industries, where Bruce has a scientist named Dr. Langstrom working on a project related to bats. In truth, Langstrom actually develops a serum that can turn him into the ""Man-Bat"", so people will fear him. Man-Bat goes out of control and flies out into the city, feeding on animal blood.

Batman meets Firefly, a man who dresses in a heavily-armoured fly ensemble and has a turbo-enhanced jet pack. Firefly breaks into numerous Gotham companies, destroying their technology, and takes to the skies when Batman arrives. As the Bat finds out, he's no easy foe to bring down. Meanwhile, Bruce meets up with Mayor Grange, who tells him that he's going to have to give his father's charity work to GothCorp instead of Wayne Enterprises due to his lifestyle.