Forbidden Friendship

Mara and Emelyn are excepted into Hogwarts but things are not what they seem when Hufflepuffs dormitory is attacked by..... something. They have to figure out how and why this happened. It's their 5th year and things are all starting to go haywire. Time is ticking but at the same time the clocks of Hogwarts are freezing in place and no one can get out or in. So no help. They have one year to uncover the mystery before time itself is lost.