In 1949, Dr Jacob Bronowski installs a secret, alarmed room in his house. Fifty years later his grandson discovers his secrets, unearthing echoes from across six million years of human history, told from the perspective of a century in which every year is a revolutionary year.

In 1949, Dr Jacob Bronowski installs a secret, alarmed room in his house. Fifty years later his grandson discovers his secrets, unearthing echoes from across six million years of human history, told from the perspective of a century in which every year is a revolutionary year.