Many years ago, humans and demons lived in harmony. But that unity  ended when demons started attacking humans and plotted a mission to  unleash Gyumao - an evil demon imprisoned for thousands of years. Now,  Genjo Sanzo, a rogue priest, must team up with three demons - Sha Gojyo,  Son Goku, and Cho Hakkai - and embark on a perilous journey to the west  to stop these demons from resurrecting Gyumao and restore the balance  between humans and demons on Earth.