Five online forum members who have never met decide to meet when one of them, Bejan, says that he has the missing part of "The Utopia Experiment," the legendary manuscript of a cult graphic novel. Bejan turns up dead and another member, 11-year-old Grant, sees him murdered. Grant escapes with the manuscript and flees for his life, while the other three friends--Ian, Becky, and Wilson--soon finds themselves either framed for sex crimes or targeted for torture and death.
Jessica tells Ian, Becky, and Wilson the new reality that they have to face as fugitives. Meanwhile, Grant makes a new friend while dealing with the realities of his situation, and Michael reaps an unexpected benefit from having betrayed his superior and buying the flu vaccine from Corvadt.
The Network takes extreme measures to capture Grant. Meanwhile, Ian contacts Milner at MI5 and the group learns more about Mr. Rabbit. And Michael goes to Shetland Island to get the samples that Donaldson needs.
The group takes refuge in a deserted manor and tries to work out the meaning of the manuscript. Meanwhile, The Network threatens Michael, while Milner and Ian form a secret alliance... unaware that Becky has her own agenda.
The group interrogates Letts and finally learns The Network's endgame for humanity. Meanwhile, Michael negotiates with Geoff, Arby takes Jessica to his birthplace, and Milner puts Ian in touch with a possibly ally.
Michael discovers that the vaccine containing Janus is ready to be shipped throughout England. When Ian approaches him, Michael offers his help. Meanwhile, Becky and Wilson both face tough choices, and Michael learns that someone close to him isn't what they seem.