Once upon a time in the land of Berk, Hiccup was flying on Toothless when a strange magic portal opened. Out of it came Merida from the land of DunBroch. Hiccup was startled but curious. Merida was amazed by the dragons. They decided to team up. Hiccup showed Merida how to ride Toothless and in return, Merida taught Hiccup some of her archery skills. Together they went on an adventure to save both their lands from a common enemy that was using dark magic.
Imagine if httyd's Snotlout found himself in the world of brave. He was full of bravado as usual. He thought he could easily handle any situation. But when he met Merida, she put him in his place quickly. Merida showed him how to be truly brave, not just boastful. Meanwhile, in Berk, the other dragon riders were worried about Snotlout. So, they set out to find him. When they arrived in Merida's world, they were greeted with suspicion. But after some misunderstandings were cleared, they all worked together. The dragon riders taught the people of DunBroch about dragons and Merida taught them some new combat skills.