Specifically, this academy exists to train soldiers for the war effort. Magic using individuals are rare in this world, so faction A has begun kidnapping/conscripting young magic users and forcing them into training (with perhaps a small amount of brainwashing on the side) to be the cornerstone of the army against faction B.
No I haven't thought this through much yet. Plus I'm horrible with names.
Anyway, students would be trained in magic for warfare (non militaristic uses of magic would be strictly forbidden from practice) and secondarily for close combat. Particularly problematic students would be taken for "rehabilitation" and so most don't attempt to escape for fear of getting caught. In that way, we're mixing prison drama with classical magic academy. Yay diversity!
Spies would be among the students, spies for both factions, and the main goal would be escape, and hopefully being able to end the war or otherwise take down the villainous evil empire. I'm always open to contributions, so put any suggestions for names or plot or etc. down below if you're interested!