FRONTLINE continues its investigation of nuclear safety with an unprecedented account of the crisis inside the Fukushima Dai-ichi nuclear complex after a devastating earthquake and tsunami struck Japan on March 11, 2011. With exclusive eyewitness testimony, FRONTLINE tells the story of the workers struggling frantically to reconnect power inside the plant's pitch-dark and highly radioactive reactor buildings; the nuclear experts and officials in the Prime Minister's office fighting to get information as the crisis spiraled out of control; and the plant manager who disobeyed his executives' orders when he thought it would save the lives of his workers. The story profiles the Japanese soldiers and firefighters drafted to cool the reactors, who were wounded when the reactor housings exploded; and the families living near the nuclear plant, who unknowingly fled in the same direction as the radioactive plume, exposing themselves to dangerously high radiation levels.