Until the arrival of Aiken drum, the 100,000 humans who had fled backward in time to pliocene exile on earth knew little but slavery to The Tanu, the humanoid aliens who came from another galaxy. But King Aiken's rule is...Until the arrival of Aiken drum, the 100,000 humans who had fled backward in time to pliocene exile on earth knew little but slavery to The Tanu, the humanoid aliens who came from another galaxy. But King Aiken's rule is precarious, for The Tanu's twisted brethren are secretly maneuvering to bring about his downfall.