At St Oswald's, a long-established boys' grammar school in the north of England, a new year has just begun. For the staff and boys of the school, a wind of unwelcome change is blowing. Suits, paperwork and Information Technology rule the world; and Roy Straitley, the eccentric veteran Latin master, is finally - reluctantly - contemplating retirement.

But beneath the little rivalries, petty disputes and everyday crises of the school, a darker undercurrent stirs. And a bitter grudge, hidden and carefully nurtured for thirteen years, is about to erupt.