Jack Simon and Hayes Turner—settlers from the planet Gabo—escape from the barbarians into the cargo spaceship’s bunker. But their ship turns out to be in the hands of space pirates. Interstellar bandits, having heard the prisoners’ story about the bloodthirsty barbarians, decide to go to Gabo to engage in the slave trade—yet the task proves beyond them, because the Kani-no arrived on Gabo from a parallel world, and behind them come those who are far more dangerous.