The world’s best forger (This forger is so good, when she recreates anything, only she is able to tell which one is original and which one is her copy. Artwork, money, documents, she can replicate them to perfection) is called for an urgent request.
It turns out, copies of the Seven Wonders of the World have popped up right next to the originals and no one can tell which is the original and which is a copy. When this forger goes to inspect them, even she cannot differentiate between the original and the copy. It is up to her to track down who exactly did this and why.