In short, she plays the game of hide and seek with the Scotland Yard who is actually looking for her lover, Alexander Pearce for some monetary fraud he has committed in billions. SO the plan is to simply make Mr. Depp seem like Alexander Pearce and lead the cops into trailing them rather than the actual convict. The fights, chasing scenes and not to forget the Jolie factor is what the movie is all about. And not to forget Jack Sparrow is the most screened loved actor of all times. As said Angelina actually took mannerism classes for this role and seems so, that not even a single glance of hers has been wasted on any frivolous move.
As for the story, though a little weak still its makes up for the screen presence of the A-list stars that stud the movie with their charm. Overall not a bad movie to watch.