Deputy United States Marshal Jack Carter stumbles upon Eureka while transporting a fugitive prisoner (his own rebellious teenage daughter Zoe) back to her mother's home in Los Angeles. When a faulty experiment cripples the sheriff of Eureka, Carter finds himself quickly chosen to fill the vacancy. Despite not being a genius like most members of the town, Jack Carter demonstrates a remarkable ability to connect to others, keen and practical insights, and a dedication to preserving the safety of Eureka. Eureka took place in a high tech fictional community of the same name, located in the U.S. state of Oregon and inhabited by brilliant scientists. Camouflaged by an electromagnetic shield, the town is operated by a corporation called Global Dynamics (GD), which is overseen by the United States Department of Defense. The town's existence and location are closely guarded secrets.