The United States conducted highly classified atomic testing in the Marshall Islands. One of the ships used in the mock up fleet was a captured Japanese Battleship, the Nagato. These ships were equipped with an array of equipment, from cameras to Geiger counters, as well as various farm animals. These tests were intended to determine "Fleet Survivability" in the face of a thermonuclear implosion. Unfortunately, no one fully understood, or could even begin to imagine, the utter devastation about to be unleashed...or the consequences!