Ada Lace--third-grade scientist and inventor extraordinaire--has discovered something awful: her neighbor's beloved Yorkie has been dognapped!

With the assistance of a quirky neighbor named Nina (who is convinced an alien took the doggie) and her ever-growing collection of gadgets, Ada sets out to find the wrongdoer. As their investigation becomes more and more mysterious, Ada and Nina grow closer, proving that opposites do, in fact, attract.