I love this adventure hook! I am not going to tell you much about it as it could spoil the surprise if your players got wind of what is actually going on.
What I like about this particular publication is that it is one of the most substantial documents. You get a one page adventure hook but also full colour printable battle maps. You print off the twelve pages and join them together to get the layouts for the adventure. It seems to me that we are ever inching a little closer to producing a really full on adventure module.