From the moment they are born, Jacqueline & Jillian are cossetted and confined, pushed into roles as the girlish and boyish pair their parents began to plan for the second they found out they were expecting twins. At twelve, Jack & Jill take a tumble--not just down a hill, but through a trunk to another world, a desolate landscape of moors, vampires, and mad science. Here, Jack and Jill finally have the chance to decide who they want to be--but in an amoral society, filled with blood rites and resurrection, what will these mirror sisters become?