This documentary is the inside story of Roger Cox, the lawyer who initiated ground-breaking legal actions against the Dutch government and oil giant Shell. The result: two landmark rulings that sent shockwaves through political offices and corporate boardrooms around the world, and led to a wave of international climate cases. This is a character-driven journey through the highs and lows of his trials, featuring a cast of creative lawyers, activists, and ordinary citizens pursuing what they see as the legal showdown of the century. Their story is set against interviews with world-leading experts on the principles of justice that can be applied to the greatest challenge humanity has ever faced.