Under Snape's Regime

Neville has no choice but to return to Hogwarts for his seventh year. But will it even be like Hogwarts anymore, with Snape as Headmaster? Ron, Hermione and Harry are surely on the run miles away. Neville must restart Dumbledore's Army along with Seamus, Luna, Ginny and the others in order to protect what's left of the school in time for the trio's unknown return...