The Emperor had been killed, his fleets scattered, and admirals defeated. Luke Skywalker and Mara Jade have found themselves in a galaxy where all their work has been undone, with other stranger changes lurking.
The year is 1943. The Chamber lies unopened and Grindlewald roams unchecked. Neither Tom Riddle nor Albus Dumbledore is satisfied with the situation. Luckily when Hogwarts is attacked they'll both have other things to worry about.