Jak vycvičit draky: Závod na hřeben

At Berk, Hiccup finds out someone is attacking and luding ships. They take off to find a Dragon and a rider who is doing this. They find out information and go to the island to find a shocking discovery A rogue Dragon Rider aboard a heretofore unseen Razorwhip starts attacking ships. Hiccup and his team investigate. Almost completely bested by this attacker, the Dragon Riders finally unmask the rider as the familiar... Heather. Their renewed acquaintance is a generally happy one, but why she's out attacking ships is in formation she's quite unwilling to share, so Hiccup investigates on his own.