Hiccup Horrendous Haddock III was an awesome sword-fighter, a dragon-whisperer and the greatest Viking Hero who ever lived. But it wasn't always like that. Hiccup's memoirs look back to when Hiccup was just an ordinary boy, and finding it very hard to be a Hero. What happens when someone says 'Do Not Open This Box'? Hiccup Horrendous Haddock the Third, now in pirate training, finds out when the box is opened not once, not twice, but three times!