It's summer term and Alfie Wickers is back in high spirits to get his class through their exams. But there is a shock for Alfie with the revelation that his dad Martin Wickers has been appointed as the new deputy head whose first jobs are to increase class sizes and fire a member of staff after Fraser has badly invested the school's money in his own clothing range, Dolce and GaBanter. For Alfie this means a new class member, Cleopatra, and a tough decision to make - stand by his girlfriend, Miss Gulliver when she leads the teachers on strike, or sacrifice himself to save his class from failing their exams.
Alfie is the worst teacher ever to grace the British education system, and a bigger kid than his students.
Despite his obvious shortcomings, Alfie's position at the school is stable thanks to Fraser, the school's headmaster, who tragically longs to be as cool as Alfie. He's the teacher who just wants to be everyone's 'best mate' and is prone to massive and very public mishaps.
There's also Miss Gulliver, the school biology teacher and the apple of Alfie's eye. She cares deeply about the school and the students.
Deputy headmistress Pickwell is less easy-going. She is an 'old school' teacher and can't stand her younger colleagues. She's a disciplinarian who wants Creationism put back on the syllabus and would prefer a school without children at all!