When Buzz and Liz visit the zoo, their pets Fly Guy and Fly Girl go looking for food, and find the Creatures of the Night exhibit, where they see animals that would like to eat them.

Possum is hiding from the sounds in the night, and his fear sets off a chain reaction in the other night animals.

"Dawn, Tobin, and Bismark awaken one evening to a disaster: all of the forest's pomelos have been mysteriously poisoned! As the Nocturnal Brigade sets out to investigate, they encounter Iris, a mysterious aye-aye, who claims monsters from the moon are to blame. While the three heroes suspect a more earthly explanation, the animals of the valley are all falling ill. And then Tobin gets sick, too! The Nocturnal Brigade must race to find answers, and...

"In The Nocturnals: The Hidden Kingdom, animals in the valley start to trip on the crumbling ground beneath them, water disappears, and disembodied voices are heard. Everyone assumes the forest is under an evil spell. However, it's a group of veiled creatures--a chameleon, stick bugs, leaf bugs, and other assorted camouflaged insects--that are upset because they want the valley's recognition for their hard work in preventing a drought. The Nocturnal...