When a distress call from Trader Johann arrives at Dragon's Edge, Hiccup, Snotlout, and Fishlegs go to investigate leaving Astrid, Ruff and Tuff to keep watch on the Edge. When Ruff is captured by Dragon Hunters, it's up to Astrid and Tuff to defend the Edge from a dragon hunter army.

When a new tidal class dragon, the Sea Shocker, is found in Edge Cove, the riders must help it escape a group of hungry Scauldrons and reunite it with its migrating pod.