Caspar is acting strangely and it has something to do with a mysterious ship that has appeared off the coast of Thistlewick Island. Felix and Drift sneak onto the ship to investigate.
There, they encounter a dark, creepy woman with a crystal ball, and realise that she is hypnotising Caspar in order to find out information. But the woman isn’t in charge of the ship – she is working for someone else. A man who wants revenge on Felix and will destroy the whole of Thistlewick to get it. Felix is captured by a ghostly white mist, which ties her up like rope. Unable to escape, she looks up at the giant, shadowy figure that appears above her. At his menacing, bloodshot eyes. Who is it that is taking his revenge on her?
