In 1943, during World War II, Churchill, Roosevelt and King met in Quebec City to sign an agreement that set in motion a top secret plan to build with world’s first nuclear weapon. Two years later, the world officially entered the atomic age, when the first atomic bomb was detonated in the New Mexican desert. Hiroshima and Nagasaki would follow soon after.

Atomic Reaction tells the story of prospector Gilbert LaBine who in 1930, discovered a rare radium deposit on the shore of Canada’s Great Bear Lake. Two years later, he would build a state-of-the-art radium refinery in Port Hope, Ontario which would prove vital in the work of the Manhattan project and the development of the world's first A-Bombs. But the fallout of this secret history will not remain buried; today, Port Hope is the site of a 2.6 billion dollar effort to clean up radioactive soil, the largest such effort in Canadian history.

Nominated for Best History Film at the Canadian Screen Awards, discover Canada's secret and pivotal role in the nuclear age, and how the fallout continues to be felt to this day.