Lydia allows her stint as hallway monitor to go to her head. Super-bossy, she delights in setting down rules and regulations for the others to follow. Earl finds the whole situation endlessly amusing -- until Lydia vows to crack down on individuals holding overdue library books. ""She wouldn't dare,"" thinks Earl, glancing over at the cobweb-covered pile of library books lying beside him. Would she? Incensed, Earl morphs the school into a lawless town right out of the Old West. Lydia, assuming the mantle of sheriff, sets out to bring her own brand of justice to the place. She succeeds -- perhaps a little too well. With everyone in the hoosegow, who's going to back her up when the nefarious Harwood Gang rides into town? Ultimately, her friends come through for her in the end as Lydia comes to realize a simple truth: it's bad to be bossy.