"Monsters all over the world have different ways to scare, but they all have one thing in common: they all love zany underpants! And every Saturday night, you will find them in a secret cave, showing off their fancy pants as they dance the Monster Bop! But they have to make it home before the sun comes up--after all, who would be scared of monsters in underpants that are striped and dotted? -- From the publisher.