Fifteen years ago, Japan was hit by the most powerful earthquake in a thousand years. The resulting tsunami breached the sea defenses at the Fukushima Daiichi nuclear power plant. Reactors were shut down, cooling pumps were rendered inoperable, and nuclear fuel leaked. This crisis could have caused a catastrophe ten times greater than Chernobyl. This docuseries reconstructs the disaster for the first time through the eyes of the workers trapped there at the time.