The Tao-tainted bullet has turned the cat back into a kitten! While Train sulks at this new turn of events, the girls are thrilled to have a younger brother of their own. And Sven just can’t get enough. The sweeper takes off to learn what he can about the nanotechnology which now infects two of their gang, enlisting Rinslet's aid. As those left behind fall in with the local street urchins, a youthful quest for vengeance stirs up dark memories from Train's own past. Harsh life lessons seek to sweep youth away far too soon, but perhaps redemption can be found in the sweet innocence of childhood...