In an alternate history of New York, three kids try to solve a modern-world puzzle and complete a treasure hunt laid into the streets and buildings of the city.
Edgar the mouse is frustrated when his architectural and artistic creations, made from tasty leftovers, are gobbled up by other mice, until he finds the perfect solution.
Marmalade and her crew of construction kittens are in high demand, and their latest assignment is to build the new Mewburg bridge, but along with the bridge comes the one thing that cats hate most of all.
