It is 1924: a time of rebuilding both in America and in the devastated cities of Europe and Canada. In the United States, the Socialist Party battles Calvin Coolidge to hold on to power. In a world of occupiers and the occupied, of simmering hatreds, shattered lives and pent-up violence, the centre can no longer hold. And for a powerful nation, the ultimate shock will come when a fleet of foreign aircraft rains death and destruction on one of the great cities of the United States.