He was never going to see Ron and Hermione again--

And their faces burst clearly into his mind as he fought for breath.

'EXPECTO PATRONUM!'

An enormous silver stag erupted from the tip of Harry's wand; it's antlers caught the Dementor in the place where the heart should have been; it was thrown backwards, weightless as darkness, and as the stag charged, the Dementor swooped away, bat-like and defeated.

Chapter 1