On December 6, 1917, the world is embroiled in one of the worst conflicts in human history. Back on the home front, in Halifax, Nova Scotia, a sleepy town goes about its day.

But during this globe-spanning conflict, no one is safe. Loaded onto a tramp steamer, the SS Mont Blanc, is a massive amount of explosives. In its path is a steamer on a time crunch.

What ensues would go down in history as one of the worst explosions of all time.