'The Pirate's inconvenience'(Pirates of the Caribbean fanfict)

This story goes about Jack Sparrow, but something is of. This pirate is in a great problem between himself and his surroundings. He also sees things(hallucinations) that cannot be unseen.
He met a Shadowed figure one of his "hallucinations". But is it a Hallucination, or is it real?Can Jack trust this creature, or is all hope lost.