In "Pirates of the Caribbean: Dead Man's Chest," you will not be disappointed - just not as fascinated since the novelty is not there any more. That does not mean the plot is not engaging or the acting is poor or the cinematography unimpressive. In fact, the movie improves upon the previous one in all of these.
This time, the search is on for a chest that is linked to a key which is linked to a compass that Jack Sparrow has. Actually the plot is even very confusing, espcially if you saw the first movie a long time ago. But like any fantasy, don't get too involved with the plot or don't think too hard about the movie - after all almost everything in the movie is one big fantasy.
Finally, I would have really liked this movie to have less violence. Such movies are excellent for children but we felt that the violence was a bit too much for little children.