After an enticing rumour, Team Natsu, Gajeel, Levy, Wendy and Juvia head off to a mysterious and dangerous island inhabited by "Vikings", as these people call themselves. What will they find on this island, and what secrets will be uncovered?

When Gray goes out on a seemingly plain mission, things go very wrong and he meets a stranger. As it turns out, worlds are crossing into each other and people are crossing over. What will happen when Elrics and co meet Fairy Tail? And who is this mysterious girl who saved Gray's life? What secrets does she hold and is she a friend or foe?