In the desperate hours and days after the Fukushima nuclear disaster, the fate of thousands of Japanese citizens fell into the hands of a small corps of engineers, firemen and soldiers who risked their lives to prevent the Daiichi nuclear complex from complete meltdown. This is their story, with rare footage from inside the plant and eyewitness testimony from the people on the frontlines.

An unprecedented disaster -- Nuclear meltdown begins -- What about the workers? -- Fukushima's uncertain future.