It’s 1925 and a manager at General Electric known as W.I. Enfield has a special job for a new employee, Marvin Pipkin. He asks the latter to solve an age-old light bulb problem – create a durable frosted bulb that didn’t filter out too much light. Nobody had ever managed to do that, so giving the job to new staff was almost a practical joke. But Pipkin takes it on with his customary determination – and Enfield was in for a big surprise.