Journey to the West is an old book. It was written by Wu Chengen in the Ming Dynasty.
In the book, there are four main roles. Tang Sanzang is a monk. Sun Wukong is a monkey. Zhu Bajie is a pig. Sha Wujing is a monk too. Tang Sanzang is their “shifu”.
The four go on a journey to the west together. They wants to get the Buddhist scriptures (佛经). On the way, they meet many monsters. They never give up. In the end, they get the Buddhist scriptures.