Mara Turing, alongside her friends Daniel and Noa, navigates the complexities of teenage life in Liverpool while dealing with school bullies and the lingering mystery surrounding her uncle Arnold. As they refine their skills as young hackers, they find themselves targeted by the Salamander Squad and the watchful eye of the artificial intelligence, Hermes. Meanwhile, the escape plans of Falko McKinnon and the tension of school life create a high stakes environment where technology and wit are their only defenses.