Jon Whitcroft was perfectly happy until The Beard, his mother's new partner, came along.

With Jon struggling to adjust, his mother decides to send him away to boarding school in Salisbury.

Jon soon finds himself targeted by a pack of vengeful ghosts at the school.

Along with his new friend Ella, he summons the ghost of the knight of Longespee as his protector.

But just whose side will the ghost knight be fighting on?