Pax has made it through the trials of his first year at Scholastic Parliament, but any hopes of a quieter second year are quickly dashed when he makes a shocking discovery in the school's basement. A new student joins the school, acting suspiciously and muscling in on Pax's friendship with Samuel. At least being reigning champions in the Parliamentary Polls allows Pax and his friends to explore the city at weekends. But drone raids and cyber-attacks disrupt life in New London while a paranoid mayor cracks down hard on terrorism.

Unwittingly, Pax helps an innocent man get captured. Driven by guilt, he seeks out the Underground resistance movement and is given a mission to steal some codes from the mayor. In the process, Pax uncovers the shocking truth about a new factory that threatens the lives of millions of people. He is torn between stopping this latest sinister plot and focusing on schoolwork to keep alive his dream of becoming an engineer. To achieve both, he'll need help. But who can he trust in a city full of falsehoods? What sacrifices will he need to make? Find out in the latest instalment in the London Falling series.