Sky is a seventeen year old girl who has short silver hair and red eyes. She is sometimes mistaken for a demon but in reality she's just a human girl. Sky is a maid for a very rich girl who is supposedly engaged to Alois trancey. Sky may be a normal human girl but she's very skilled with knives and daggers pretty much any sword. What will happen when all the phantom hive and trancey boys fall for the maid? What will they do when they find out about sky's past? Let's see!