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!