Rod Liddle, a self-described lapsed believer turned skeptic of his own atheist convictions, sets out to test a provocative question: can atheism itself curdle into the same intolerance and fanaticism it accuses religion of practicing. He interviews a range of figures across the belief spectrum, from committed churchgoers to outspoken atheists, pressing each on where reasoned skepticism ends and dogma begins. The film pushes back against the idea of atheism as one unified stance, showing instead a spread of positions from quiet indifference to organized campaigning against religious belief. Liddle turns particular attention to the more strident voices within the atheist movement, asking whether their certainty and rhetoric mirror the religious zealotry they condemn, while also giving space to atheists who reject that comparison outright. The tone stays conversational rather than polemical, built on Liddle's own interviews and on-camera exchanges rather than narration handing down conclusions. It ends without settling the argument, leaving the question of where conviction turns into fanaticism open for the viewer.