When Hookfang's flame goes out after Snotlout pushes his training too hard, the kids have to figure out how to reignite it with the burning heat of Fireworm dragons before it's too late, but not before discovering that Fireworms act similar to bees in a beehive, and they have an angry queen, too!

When the team has an argument about who is the best dragon trainer, a "competition" take place to see who is the best dragon trainer despite Hiccup the only member who keeps telling them that it is not a competition. They each receive a Terrible Terror and are given one day to train it and teach it tricks, such as head butting, controlled fire shooting, and some dog-like tricks. While wrapped up in trying to beat Snotlout, Fishlegs fails to notice that Meatlug caught Outcasts sneaking into Berk, which leads to her being captured!