A group of teenagers uses their combined talents to re-steal several priceless paintings and save fifteen-year-old Kat Bishop's father, himself an international art thief, from a vengeful collector.
When twelve-year-olds Hannah and Maggie switch places, Hannah must prevent a famous art theft in 1905 and Maggie must cope with modern life until they can switch back.
When thirteen high-value pieces of art are stolen from a secret museum, Calder, Petra, and Tommy are grouped with two new companions to solve puzzles that are complicated by the clever Mrs. Sharpe.