After a mistaken identity case, Fluttershy is wrongly accused of a murder attempt on one of the High Blood houses, and sentenced to twenty years of incarceration in the Brokenfang Maximum Security Prison, where the most dangerous and unpredictable Krussian criminals are sent. As her friends do what they can to prove her innocence and secure her release, Fluttershy must learn to survive in the hostile environment of Brokenfang, making both new friends and enemies, as well as to learn that not everypony is what it seems…