X Middle School has gone Canada Crazy, and the ambassador is staying over along with his assistant Penny Madrid, who happens to be an old partner in crime with Fillmore. Winston Kotter, the Canadian ambassador, turned Penny around just as the Safety Patrol turned Fillmore around—but Fillmore can't help suspecting something's up, especially as a huge supply of counterfeit baseball cards appear. However, as Winston has full diplomatic immunity, safety patrol investigation is strictly forbidden.