While helping her sister in their grandpa's magical emporium, eleven-year-old Bramble Browning unearths a curious scarlet mask. A tingling in her fingers tells her to try it on. But it fits so well, she can't take it off ... And when she looks in the mirror, the face of a highwayman, Diamond Jack, stares back. It seems Bramble has been chosen for a mission. Time to stand and deliver!