I'm in trouble

While the gang is out marking the dragons on their respectful islands, Hiccup gets into a little scuffle with Astrid. In his haste to get away the two of them crash land on a never before seen island. Being the curious vikings they are, they cross paths with a new dragon that has a strange capability to make its prey body swop, ultimately causing Hiccup and Astrid to be trapped inside of each other's bodies. Will they find a way to switch back or will they be stuck like this forever? Read and find out.