Thinking that some extra responsibility might do Mildred good, Miss Cackle asks her to look after the new first year, Enid Nightshade. Soon Maud feels Mildred hasn't got time for her any more & goes off in a huff. To make matters worse, Enid sneaked her pet monkey into the school & he's on the loose! Now Miss Hardbroom thinks the roving monkey is Ethel & that Mildred is obviously responsible!