Went to see this movie yesterday.
The sequel to The Lion, the Witch and the Wardrobe, the story basically follows the book closely and is faithful to the original.
In a nutshell, its been a year since the children ended up back in England. Meanwhile in Narnia, hundreds of years have passed. A group of humans called the Telmarines have taken over and driven the Narnians underground.
Prince Caspian's story starts with the birth of his nephew. Now that his uncle has a clear hier, its time for him to eliminate Caspian. The Prince flees to forest and calls for help. That call draws the children back to Narnia.
The religious overtones of this series continues in this book. If you liked the first movie, you will like this one. I know I did and loved the sequel.
In 18 months, Voyage of the Dawn Treader will be released. Can't get here soon enough!