Humanity, thought to be extinct survived through the Conversion Wars and fled into the stars.

Ponykind, a race of Equines that see anything that isn't them unpure and needs to be "brought to the light." Setting their sights on other primitive species they begin to coverage them, hundreds of species now lay extinct, giving them new technology and power. They think nothing can stop them, but when humanity resurfaces, will ponykind be ready for the horrors that humanity has done to themselves… just to destroy them?