Grace Everson is not your normal 16 year old girl. She, along with her crew, has been taught from birth the tactics of being a successful thief. Taught everything from simple pick-pocketing to how to pull off an extravagant con, Grace has stolen many items ranging from a set of car keys to diamond necklaces, all with and without the help of her crew. Just when she thought things weren't going to get exciting, her family is suddenly framed for stealing the Koh-i-Noor (Mountain of Light), a diamond worn by several British Queens and housed with the other Crown Jewels in the Tower of London. The British Crown Jewellers are now after Grace's family and Grace is charged with the responsibility of restoring the Jewel before her family is punished for something they didn't steal.
At school, Grace meets a new boy, Ryan Taylor, who turns out to be like her, a pavement artist. Allowing him to join her crew, Grace sets off to steal the Koh-i-Noor back and return it in order to clear her family's name and stop the Crown Jewellers from coming after her.