When people call Bunsen a beast, they mean it literally. He's the first blue monster ever to enrol at Muckledunk Middle School. His best friend is Mikey Munroe who just happens to be human, and he helps Bunsen fit in at school and complete the tasks humans take for granted. In return, Bunsen introduces him to the world of monsters. Everything would be fine if only Amanda Killman would stop trying to pursue Bunsen and his kind to extinction.