Although it is true that the big part of the original (huge) book was about the Pilgrimage mentioned in the Synopsis, there are two things you should know: the pilgrimage was more an adventure full of battles, monsters, magic powers, and epic Characters, rather than just a pilgrimage; and this movie concentrates on the first part of the book, before the pilgrimage (actually the Monk does not even appear), on the genesis of the Monkey King. The book was written by a great Taoist monk and it is full of hidden knowledge which not everybody can consciously understand, but it is so well done, so full of adventure and action and funny things, so intriguing and entertaining, that in the centuries it became one of the (if not the) most important books in the popular Chinese culture. There are many layers in it and it was made in such a way that almost anybody can enjoy it. The Monkey King became an extremely popular character, and even Dragonball comes from that book! This film is a bit strange, the special effects are not the best, and some things in the realization will need a bit effort from the western audience, but it is OK, you must understand that as said this is a Chinese story and obviously not made with the western people as main target. But whether you are interested or not in the background of the story, the film is pleasant and entertaining and you can surely enjoy it :) Now I just hope there will be other movies with the rest of the book!