When Becky coaxes a wilting plant back to life in the old Strange Hill Greenhouse, she gets more than she bargained for with an outbreak of plantlike PE teachers threatening to exercise the world into submission. Only Mitchell's sarcastically planted chicken nugget beast can save the day.

During a swimming test in the middle of winter in the dreaded Strange Hill swimming pool, the kids discover a mysterious paradise island in the middle of the pool. They also soon discover the isle's longtime sole inhabitant, a mysteriously huge exchange student named Ken Kong. When Ken returns to the school with our kids, it throws Abercrombie into a panic. Will Ken destroy the school? Will Templeton's woodwork project save the day? Will Becky guilt Mitchell into fixing the problem? Probably!

Mitchell, Becky and Templeton stumble across an underground lair that was home to a league of medieval superheroes - Ye Olde Righteousness League. When the League's evil arch nemesis escapes his confinement and possesses Abercrombie, our trio find themselves (and their classmates) transformed into these heroes to fight his tyranny.

Mitchell's desperate attempt to start his Christmas holiday early is scuppered when he accidentally traps everyone in the freezing school. Forced to spend the holidays together, the students and teachers soon discover mysterious things happen at the school over the Christmas holidays, things involving Santa, menacing elves and as Abercrombie goes mad, a very cheery parody of "The Shining".