Karydas is left speechless when, flying over the swamps of the island, he sees a pig. How did the pig end up on Dragon Island? Together with Mathilda and Oscar, they set out to find the solution to the mystery.

But as darkness falls, the three friends begin to feel afraid. Is there a dangerous Baboulodragon lurking in the mist? When they get trapped in the mud, just in the nick of time, a little wizard appears and saves them. But what is he doing on their island? Will Karydas be able to solve so many mysteries at once?