Petra is afraid of the monster that comes out in the dark. Luckily her very supportive -- and very spirited -- siblings find a way to turn fear into fun! Every night, in the middle of the night, Petra wakes up. She's afraid of the dark. She's afraid of the noises. But most of all, she afraid of the monster. Her brothers and sister always sleep all night long, and Mama and Papa tell Petra she'll be just fine. But Petra is still scared, so Andy, Penelope, and Zack decide to help her out. Will a T. rex scare the monster away? A magic wand? Sixteen favorite stuffed animals? What could possibly placate a hungry monster in the middle of the night?