The New York Museum of Science and History had itself a curious mystery! Somehow, each night, an exhibit was broken, and it went on too long to be a practical joke. That’s the setup that led Mona Lisa and Raphael to investigate, and inadvertently free, the ancient mutant inventor Ptah from his centuries-long imprisonment. Now, teamed up with the friendly mutant mummy Bakari, our heroes must stop Ptah from conquering the city. Plus, Shredder tries to escape an imprisonment of his own, all in the latest issue of TMNT: Saturday Morning Adventures!