Crypto infiltrates the mansion of Francodyne's CEO Henri Crousteau (Michael Lonsdale), but Crousteau escapes. Pox and Crypto learn Crousteau intends to create a virus to destroy the Furon DNA within the human genome. Crypto sets out to destroy his Nexo manufacturing operation. He causes a riot between the workers and destroys the Nexo laboratory. However, Crousteau still manages to create the virus and sends four Nexo walkers to distribute it into the river. Crypto destroys the walkers and defeats Crousteau in a final battle at the Belleville tower. He learns that Crousteau only wanted to destroy his own race to stop the planet from being polluted, that he was feeding the Nexos synthetic DNA, and that he wasn't responsible for the attack on the casino. The Nexos that attacked were rogues responding to a signal from the Furon homeworld. Crypto realizes that Emperor Meningitis (Nolan North) is responsible. He and Pox set off for the Fourth Ring of Furon to confront the emperor.