When Ottanger is thrown from his timeline from the far future, he meets the Fenris - humanity's future form. Ottanger is a survivor of the Fenris' altruistic experiment to create world walkers, their goal to help humanity escape their decaying version of Earth. But there are too few of Ottanger's fellow world walkers to make a difference. And the multiverse has revealed an even greater threat than the Committee and its harsh regime. There's a form of humanity that functions as one mind and it is anathema to the Fenris. Now the trillion-strong hive has noticed the Fenris' experiments with world walkers. It wants this technology. And it won't rest until it has it - even if this means a war across the multiverse . . .