"It's a proud day for Cyborg when he grows his very first mustache. But what happens when said mustache evolves into a living being and aims to turn Cyborg into . . . an adult?! Then, you think your family is tough? Well, say hello to Raven's uncles, Horrace the Horrid, Barry the Beastly, and Myron the Mildly Irritating!"-- Provided by publisher.