Darkness before the night

Harriet's 5th year in Hogwarts kicks off with couple of surprises like her potion master being a vampire as well as Lockhart's return. As she deals with a school year full of challenges and odd encounter. She is having strange dreams most nights. Will she be able to figure out what they are all about?[HP/SS, HG/RW, SB/RL, DM/GW] [female Harry Potter]