Dog and Hat are practically inseparable, and when the dots on Dog's favorite shirt disappear down a storm drain, the two friends descend into the sewers where they encounter many obstacles and unforseen dangers--and come face-to-face with an alligator.
As Ant, Hat, and Dog make their way to the moon to visit Ant's cousins, they discover that big dreams are not impossible, especially when new friends provide help along the way.