No one performs on the circus trapeze like 16-year-old Rémy Brunel. But Rémy also leads another life, prowling through the backstreets of Victorian London as a jewel thief. When she is forced to steal one of the world’s most valuable diamonds, she uncovers a world of treachery and fiendish plots.

Meanwhile, young detective Thaddeus Rec is determined to find the jewel and clear his name. Will Thaddeus manage to rescue the jewel? Or is it really Rémy that he needs to save?