Rainbow Dash wakes up alone, imprisoned in a sadistic cycle of death and violence for the amusement of a faceless crowd. In the arena, her opponents are the heroes and villains of all history, with fighting styles and strange abilities that are thousands of years old, and no less deadly for the wait. Outside, she must seek allies and teachers who can help her escape, and find out just what's going on in this wacked-out place.

But which is worse: that she's been trapped here without her friends to rely on? Or that they might very well be trapped here too, and she isn't there to help them?