When Alfred collapses, Batman discovers many more people are mysteriously becoming sick. The Dark Knight realizes that the Gotham City water supply has been contaminated, so he goes to the Gotham Reservoir and finds the person responsible for the contamination, Dr. Phosphorus.; Dr. Phosphorus visits an old colleague and explains how he became a monster when the reactor core at a nuclear power plant in which they both invested exploded and that he now plans to take his revenge on all those he blames, particularly City Council Chairman Rupert Thorne.