It is Harry's sixth year. Voldemort is becomming more and more dangerous. Especailly now that it's common knowledge that either he or Harry must die, and he has no plans on it being him.
Ginny is having a boring summer. But things look up when Harry arrives. Then she gets to Hogwarts and Harry has caught a gorgous new transfer students eye too. As far as Ginny is concerned, the war is ON! HP/GW and maybe RW/HG