On 26 April 1986 the fourth reactor at the Chernobyl nuclear power station exploded,setting off a chain reaction that threatened to trigger a second,even more powerful explosion. For 8 months, 800,000 soldiers, miners and civilians worked around the clock to fight the radioactivity, building a protective shield around the ruined reactor. Eight months in hell, which the survivors aren’t likely to forget. Covering a twenty year period, using 3D images and archival footage, the film re-enacts the relentless battle against an invisible and deadly enemy.