Janet Perkins, the school secretary of St. Gertrude's, announces that junior-school life has finally got her down. Realising that desperate measures are called for, the head sends her on a commando-style training course to revitalise her. Unfortunately, to the horrible criminal minds of Hairy Harry the Hatchet Man and his nasty cronies, a collection of school secretaries is an opportunity for skulduggery not to be missed. But Mrs Perkins is on the warpath with some tactics of her own. All her combat skills, battle techniques, and courage are put to the test. But can our super-cool heroine rescue the secretaries, disarm the villainous criminals, and save the day again?