Seeking escape from a perfect twenty-second-century society, a diverse group of human misfits travels six million years into the past through a one-way time portal. Expecting an untouched Eden, they instead emerge in Pliocene Europe, a realm ruled by two warring extraterrestrial races endowed with powerful mental abilities. Captured by the knightly Tanu, the displaced humans must adapt to survival under alien oppression.

Though the saga features an ensemble of time-travelers, the trickster Aiken Drum serves as a central catalyst who uses his formidable mental powers and Machiavellian cunning to claim the Tanu throne. Alongside him, characters like former Grand Master Metapsychic Elizabeth Orme and the volatile athlete Felice Uindry navigate their own extraordinary awakenings. Their competing desires ultimately shape the destiny of Earth's distant past.

As human rebellions forge uneasy alliances with the dwarfish Firvulag, the balance of power shifts, culminating in the destruction of the alien capital and the rise of a human king. The conflict escalates across continents when rogue psychics from the future intervene to seize the time-gate for themselves. Across four volumes, the series traces a grand struggle over psychic dominance, political ambition, and the roots of human myth.