在小马国远东地区，险恶的喙灵顿废土之下的避难厩里，一匹孤独的卫兵寻找着生活中的希望，乐趣，可能她还想挨一点点打。抛去忽明忽暗的灯泡，奇怪的气味，灾难将至的危机感，99号避难厩还是不错的，最该忽略的是避难厩里的种马，没错，99号避难厩真是太棒了，别去细想就好……
但黑杰克的生活被神秘的电脑文件EC-1101搅的天翻地覆，掠夺者入侵她的家园，拯救避难厩唯一的办法就是带着文件逃跑，但EC-1101是什么？EC-1101有什么用？为什么掠夺者穷追不舍？
只有99号避难厩的种马P-21陪她黑杰克了出来，他们头也不回地扎进喙城废土，追寻着EC-1101留下的线索，揭开纷缠的秘密与阴谋，化解不止威胁避难厩，喙灵顿，甚至威胁全世界的危机。
原文：
Far off in the East, in a stable beneath the infamous ruins of Hoofington, a lone mare simply wishes for a life of comfort, ease, and maybe a little flank spank in the tunnels of Stable 99. It's a nice enough place, as long as you don't think about the flickering lights, the strange smells, the ever growing sense of disaster, or the lives of the male breeders. Perfectly nice... just don't think about it...
But Blackjack's life is turned completely on its head when she discovers a mysterious computer file: EC-1101. Raiders invade her home in search of it, and the only way she can protect her home is to leave with it. But what is this file? What does it do? Why were they after it?
With only P-21, one of her stable's breeder accompanying her, Blackjack must head out into the wasteland of the Hoof, follow the clues laid out before her, and untangle a vast mystery and conspiracy which threatens not only her stable, or the Hoof, but the very world itself.
