Siblings Marlow and Zach Metzler are curious about EVERYTHING – asteroid-bound space probes, pirate ships in the woods, abandoned hotels hidden high in the mountains. Leo, a neighborhood cat, is curious about NOTHING – not pizza slices, not peacock feathers, not even laser pointers (especially not laser pointers). But when all the neighborhood birds, insects, and even their favorite teacher vanish, the three face a mystery that neither can solve alone. Racing to find all the missing creatures and stop a possible alien invasion, Marlow, Zach, and Leo must lead a ragtag band of new friends and kitty commandos against zombies, monster cats, and earthquakes to save their town and maybe, THE WORLD!