Dodging speeding freighters, crazed space cabbies and sixty million cranky pedestrians is all in a day's work for Nex, the fastest courier in Sunset City or so he proclaims. But when he discovers that his long lost sister, Ezri, is the newest contestant on Speed Switch: a no-hold barred, high octane, extreme race to the death that claimed his parents, he has to find his way into the race.