How to be a pirate

Hiccup Horrendous Haddock III is back for more Viking training, but he is still far from the hero his father expects. When a mysterious coffin washes ashore, it leads the Hairy Hooligan tribe on a dangerous hunt for the lost treasure of Grimbeard the Ghastly. Hiccup must face deadly dragons and a terrifying new enemy to prove he has what it takes to be a pirate.