Set amidst the political turmoil of pre-World War I Europe, 'Four Just Men' introduces a clandestine group of vigilantes who take justice into their own hands when the law fails to punish those they deem guilty. Their target is Foreign Secretary Sir Philip Ramon, whose proposed Alien Extradition Bill threatens to hinder the activities of those the group considers to be forces for good. As the Four Just Men embark on a cat-and-mouse game with Scotland Yard, their actions are closely scrutinized by an eager press, captivating the public's attention.