In 2006, a previously unknown Irish technology company by the name of Steorn created headlines globally when it took out a full-page ad in The Economist, in which it claimed to have made the scientific breakthrough of this – or any other – century: perpetual motion, nothing less than a complete and immediate solution to the global energy crisis. The investment money poured in, with some of Ireland's most respected entrepreneurs and institutions getting on board, but the demonstration of their perpetual-motion machine was a spectacular failure. So how did so many well-meaning and otherwise sensible people get things so desperately, absurdly wrong? The story begins with a malfunctioning CCTV system and ends with an exploding battery, and it drives home Ireland's frenzied state of mind during the Celtic Tiger years.