When she returns home after two years, Fever finds that her Scriven mother's creation, New London, the city on wheels, is nearly complete and ready to fight the nomad tribes of Britain--and Fever must journey to the north to find the ancient birthplace of the Scriven mutants and solve the mystery of her own past.

Eighth-grader Emily Lemon wakes up and discovers that none of the gadgets around her house are working properly, and the computers at her middle school seem to have a mind of their own--but when the scoreboard in the gym displays the words "the revolution has begun, down with humanity" she realizes that humanity has lost control and civilization as we know it is in serious trouble.