The Priority of the Single Sentence

2 sisters, Leigh and Emlyn get taken prisoner by an entire empire and put on death row, but are helped by 5 teenagers who work for the empire. AKA, Signa Sentayans. But, the 5 teens don't actually have any desire to help the empire, but instead, have a desire to destroy it and free all of the prisoners from the imprisoned hell they call 'home'.