The storyline revolves about the residents of Jericho, a small, rural Kansas town, in the aftermath of a series of nuclear explosions across the continental United States. The series begins with a visible nuclear explosion of unknown origin in nearby Denver, Colorado, and a loss of power and modern communications, effectively isolating Jericho. Later, power is restored to Jericho by what is alluded to as the efforts of the U.S. government, but soon after an EMP disables all electronics. Several themes addressed in the show regularly are the gathering of information, community identity, public order, limited resources, and external and internal threats. The show features several mysteries involving the backgrounds of major characters, the unknown perpetrators of the attack, and the extent of damage to the United States and its government. The Second Season is more conspiracy themed, with power back to the town it seems to be a lot brighter