The crime boss Silvermane comes to New York to call a truce with the Kingpin. The Kingpin himself has had his scientist, Dr. Everett, create a new and powerful dis-solvent fluid, capable of eating through anything. The resultant toxic waste from production of the fluid is dumped in the river, where the pollution poisons Namorita, Namor the Sub-Mariner's cousin. Namor takes her to a surface hospital, where she is treated for the poisoning. Namor then goes on a rampage, creating chaos in the city, while destroying anything that produces pollution. Spidey turns up to stop him from causing any more destruction, and the Sub-Mariner is convinced to get his message on pollution across by using the Daily Bugle. Meanwhile, Spider-Man tails crime bosses Hammerhead and Caesar Cicero, who have arrived in New York, and finds them all converging at a remote location. Namor takes Jameson on a tour of the area, showing him the effects of pollution on the environment, and soon finds Spidey in trouble ...