An unnerving head hunt in which thousands of people participate, a hunt that takes several years and called for the largest machine ever to be built. It sounds like a crazy film script, but it is the intriguing story of the world's leading physicists’ search for the Higgs particle. The documentary follows the investigation from the start in 2008 until the announcement of the probable discovery of the particle in July 2012 . The compelling enthusiasm of the scientists is so contagious that even a layman in physics sympathizes with their epic quest .