What exactly is the mysterious Great Blue Grump? Well, we know he's not a three-toed sloth, or a frilled lizard. And he eats normal stuff, like chocolate and bean sprouts. He's hairy and grumpy and blue all over -- and just happens to have an awful lot in common with…Dad!
A small girl and her friend creep through the house, with each step further embellishing the description and habitat of the Great Blue Grump who is asleep upstairs.