War photographer W. Eugene Smith travels back to Japan where he documents the devastating effect of mercury poisoning in coastal communities.

The film takes place in 1971 when we find celebrated photojournalist Eugene Smith as a recluse and disconnected from the world he once shot. After receiving one final assignment from Life Magazine editor Robert Hayes, Eugene must travel to the Japanese coastal city of Minamata, which has been ravaged by mercury poisoning.

Ushered by an impassioned Japanese translator, Aileen and encouraged by local villagers, Eugene's powerful images expose decades of gross negligence by the country's Chisso Corporation, the government and even the Yakuza.