It's the start of term for Scarlet and Ivy, and the girls are intrigued by a fascinating new girl, Ebony. She's as enchanting as she is mysterious, and quickly, most of the younger girls appear to be under her spell. But rumours swirl like ghosts around Ebony, and not all of them are friendly. And when a prank on All Hallow's Eve goes horribly wrong, it's Ebony who gets the blame.