Innocent Zero arrives to claim Mash! While Wahlberg faces down the villain, Mash and the others fight Innocent Zero's cronies in a race to help their headmaster. But they encounter a major setback when Lance and Dot are suddenly turned into babies and sapped of all their magic! Meanwhile, Wahlberg finds himself up against an unexpected opponent when his former teacher Adam is brought out to face him! Will Mash and the others be able to save the school from its greatest threat yet?!