A nerve-wracking manhunt involving thousands of people, that lasts for years and for which the largest machine ever is built: this is not a hallucinatory movie script, but the intriguing story of the search for the Higgs particle by the world's leading physicists. The documentary follows this research from its inception in 2008 to the announcement of the particle's presumed discovery in July 2012. The scientists' compelling enthusiasm is so infectious that even a layman in physics can sympathize with this epic quest.