For every successful plot in the six years since Westminster Bridge, more than twice as many have been foiled. Some were thwarted by nerve-wracking undercover operations; others were narrowly averted by heroic citizens, or ruined by the absurd mistakes of would-be attackers. Invariably, the all-too-human stories of these failed terrorists reveal the true picture of UK extremism.

Through interviews with senior counter-terror figures and astonishing court testimony, Plotters unpacks how and why British terror attacks happen--and don't. From dating websites and prison cells to Telegram networks and Tesco knives, Lizzie Dearden's deep dive offers one disturbing certainty: the plotters will keep coming. To confront them, we need to understand them.